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Authorities announced the arrest of a 22-year-old Utah man on suspicion of killing conservative activist Charlie Kirk during a Wednesday event at Utah Valley University.

Tyler Robinson was taken into custody on Thursday night, and investigators said they believe he acted alone.

Kirk, the chief executive and co-founder of the conservative youth organisation Turning Point USA, was a top podcaster and ally of President Donald Trump.

READ MORE: Alleged killer of Charlie Kirk attempted to get his friend involved in the plot

He led an effort to remake the Republican Party’s get-out-the-vote effort in the 2024 election.

Here are moments leading up to Kirk’s event, his death and Robinson's arrest. All times are local.

Friday, August 29

Ahead of Kirk's visit to Utah Valley University, a change.org petition is started titled “Prevent Charlie Kirk from speaking at Utah Valley University.”

Wednesday, September 3

Utah Valley University releases a statement affirming its “commitment to free speech, intellectual inquiry, and constructive dialogue.”

Wednesday, September 10

11.52am: The suspected shooter arrives on campus, according to Beau Mason, the commissioner of the Utah Department of Public Safety, who spoke at a Wednesday news conference following Kirk's death.

Noon: Kirk kicks off his event in the Fountain Courtyard of Utah Valley University's Orem Campus.

READ MORE: What we know about Charlie Kirk shooting suspect Tyler Robinson

About 12.20pm: As the “debate” portion of Kirk's event began, one gunshot rang out, Utah Valley University spokeswoman Ellen Treanor told the AP.

Authorities believe the gunshot came from the Losee Centre, about 183 metres away from where Kirk was speaking.

12.23pm: A Utah Valley University police officer states, “Alpha 34, we have shots fired. Charlie Kirk is down”, according to a broadcast recording from the department's dispatch line made available by OpenMHz.

Shortly after, a different officer notes that there was gunfire and that Kirk is "on his way to the ambulance. He’s on his way to the hospital".

READ MORE: Charlie Kirk's wife speaks publicly after husband's death

12.39pm: FBI agents arrive on the scene at Utah Valley University, according to FBI Director Kash Patel.

Around this time, videos begin to appear on social media that show Kirk speaking into a handheld microphone while sitting under a white tent emblazoned with the slogans ”The American Comeback” and ”Prove Me Wrong”.

A single shot rings out, and Kirk can be seen reaching up with his right hand as a large volume of blood gushes from the left side of his neck.

Stunned spectators are heard gasping and screaming before people start to run away.

12.47pm: Utah Valley University issues an alert that says a “single shot” was fired. It also says that the suspect is in custody.

2.40pm: President Donald Trump announces on social media that Kirk has died.

READ MORE: Charlie Kirk's alleged assassin had deep disdain for the commentator

2.45pm: Orem Mayor David Young says the suspected shooter remains at large.

4.21pm: Patel says on social media that “the subject for the horrific shooting today that took the life of Charlie Kirk is now in custody."

4.30pm: During a news conference, authorities confirm Kirk was brought to Timpanogos Regional Hospital and died there. They say no one is in custody and the suspect remains at large.

5.59pm: Patel posts on social media: "The subject in custody has been released after an interrogation by law enforcement. Our investigation continues and we will continue to release information in interest of transparency”

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Thursday, September 11

7.55pm: The FBI said it was looking for a “person of interest” and released a series of photos showing the person wearing a hat, sunglasses, a long-sleeve black shirt, and a backpack.

Police released video of the person racing across the roof of the building from where authorities say the shot was fired, dropping down to the ground and walking off campus.

At some point that evening, a family member of Robinson's reached out to a family friend who contacted authorities with information that Robinson had confessed or implied that he carried out the shooting, Utah Governor Spencer Cox said Friday.

10pm: Robinson was taken into custody, officials said Friday.

Friday, September 12

8.05am: Authorities announce that 22-year-old Tyler Robinson from Utah is in custody in Kirk's shooting. Robinson was booked into Utah County Jail.

About 10.20am: A probable cause statement outlines the evidence gathered against Robinson, who was arrested on suspicion of aggravated murder, felony discharge of a weapon causing serious bodily injury, and obstruction of justice.

All are state felony charges, and aggravated murder carries the possibility of the death penalty.

Formal charges are expected early next week.

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Traffic backed up after the bridge was closed at 2.30pm.

Police said no major incidents were reported despite tense counter-protests.

Tens of thousands have taken part in the march from Aotea Square to Victoria Park.

The retaliation saw the young victim catapulted through the air and landing on concrete.

Tyler Robinson, the 22-year-old in custody as the suspect in the fatal shooting of conservative activist Charlie Kirk, registered to vote with no party affiliation and hadn't cast a ballot in the two most recent elections.

But a family member told investigators that Robinson "had become more political in recent years," Utah Governor Spencer Cox said at a press conference Friday morning – and in particular had lashed out at Kirk, the family member said.

Authorities, who have described Kirk's killing as a "political assassination," discovered anti-fascist messages engraved on ammunition with a rifle near the site of the shooting that hint at that political transformation, Cox said.

Those messages included one that said, "Hey fascist! Catch!" and another that appeared to reference an Italian anti-fascist song.

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Robinson grew up in Washington, Utah, and earned a scholarship to attend Utah State University after a strong academic record in high school, but dropped out after just one semester, according to public records, social media, and a university statement.

Voter registration records show that Robinson is registered to vote unaffiliated with any party, although he is also listed as an "inactive" voter, meaning he hasn't voted in at least the most recent two general elections.

State and federal court records do not show any prior criminal cases involving him.

His listed address in the probable cause statement is the six-bedroom home of his parents, who own a granite countertop business and are registered to vote as Republicans.

Robinson has two younger brothers and his parents have been married for about 25 years, according to social media posts.

Social media photos show Robinson wearing grey Converse shoes and sunglasses that appear similar to those worn by the shooting suspect in photos released by law enforcement earlier this week.

Cox said at the press conference that a family member of Robinson had reached out to a family friend Thursday night, and the family friend told the Washington County Sheriff's Office that "Robinson had confessed to them or implied that he had committed the incident."

Robinson was taken into custody around 10pm Thursday, after a 33-hour manhunt, FBI Director Kash Patel said Friday.

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Robinson's hometown is a quiet suburb of St. George, a city in the southwest corner of the state. It's about a three-and-a-half-hour drive from Utah Valley University, where Kirk was gunned down on Wednesday afternoon while holding a campus event.

Robinson is currently enrolled as a third-year student in the electrical apprenticeship program at Dixie Technical College in St. George.

Social media posts by Robinson's mother reflect an active family with vacations to Disneyland, Hawaii, the Caribbean and Alaska.

They frequently spent time outdoors — boating, fishing, riding ATVs, zip-lining and target shooting.

A 2017 post shows the family visiting a military facility and posing with assault rifles. A young Robinson is shown smiling as he grips the handles of a 50-calibre heavy machine gun.

"He wouldn't really talk to you unless you said something to him," said Durban Mickelson, who said Robinson would frequently buy supplies from the store where Mickelson works in St. George.

"Just always very quiet, kept to himself."

Cox said that a family member of Robinson had told investigators that at a recent family dinner, Robinson had mentioned Kirk's upcoming Utah Valley event, and "they talked about why they didn't like him and the viewpoints that he had," Cox said.

"The family member also stated Kirk was full of hate and spreading hate."

The bolt-action rifle Robinson used and left in a wooded area near the campus had various phrases engraved on the bullet casings, Cox said, including "Oh bella ciao, bella ciao, bella ciao, ciao ciao," which appeared to reference an Italian anti-fascist song.

Other engravings hinted more at connections to online trolling and memes, including one that said, "If you read this, you are gay LMAO."

Robinson graduated from Pine View High School in St. George in 2021, a spokesperson for the school confirmed.

He received a resident presidential scholarship to attend Utah State University, according to a Facebook video his mother posted of him reading a letter about the award.

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Sydney will soon follow Paris and New York by introducing fixed-fare taxi trips from the airport to the CBD.

Locals and visitors will pay a flat fee of $60 from Sydney Airport under a 12-month trial which will begin on November 3.

Taxi drivers will not be allowed to pass on any additonal tolls or surcharges on top of that price.

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Up to 5000 taxis queue up at the international and domestic terminals at Sydney Airport each day.

The trial was recommended by the NSW Point to Point Commission in response to frequent complaints taxi drivers are taking advantage of first-time arrivals to Sydney.

According to the commission, hotel concierges have raised concerns their guests have paid fares of more than $150 for the 13-kilometre trip to the CBD.

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The Point to Point commissioner has issued more than 1100 fines to taxi drivers since the introduction of the Taxi Fare Hotline in November 2022.

The practice of overcharging and refusing to use meters has even led to drivers touting for business inside the arrivals hall at the airport.

According to the commission, a Sydney taxi driver was fined $2000 for refusing to use the meter and charging an overseas family with a $188.76 fare from the international terminal to a hotel in the CBD.

The NSW taxi industry and the operators of Sydney Airport have supported calls for a flat fare structure.

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NSW Taxi Council CEO Nick Abraham said members of the association believed set fares would provide certainty and confidence for passengers.

"Pending the success of the trial, we would like to see the set fares extended to other locations across Sydney, as well as reciprocated for trips coming back to the airport," Abraham said.

Sydney Airport CEO Scott Charlton said the fixed fare trial puts Sydney on par with cities like New York and Paris.

"More than 40 million people pass through Sydney Airport every year," Charlton said.

"For many, their first experience of Australia is when they get into a taxi.

"Knowing how much they will pay to get to the city is a positive step."

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A 22-year-old Utah man who was arrested and booked on murder charges in the assassination of Charlie Kirk held deep disdain for the conservative activist's provocative viewpoints and indicated to a family member that he was responsible for the shooting, authorities said.

The arrest marked a major break in a case that shocked the country and raised fresh alarms about political violence in a deeply polarised United States.

Tyler Robinson had become "more political" in the run-up to the shooting and mentioned during a dinner with family that Kirk would be visiting Utah, Gov. Spencer Cox said at a news conference.

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The Republican governor cited as evidence engravings on bullet casings found in the rifle that authorities believe was used in the attack, as well as chat app messages attributed to the suspect that a roommate shared with law enforcement.

The governor credited Robinson's family with helping turn him over to authorities.

"Ladies and gentlemen, we got him," Cox said soon after the arrest was first heralded by President Donald Trump on the Fox News show "Fox & Friends."

Robinson is believed to have acted alone, and the investigation is ongoing, Cox said. He was arrested on suspicion of capital murder, weapons and obstruction offences. He was expected to be formally charged Tuesday ahead of an initial court appearance.

Robinson's arrest capped a frenetic day-and-a-half search that just hours earlier seemed stuck when authorities pleaded for tips and leads from the public. The assassination while Kirk was speaking at Utah Valley University reverberated across the country because of his outsize influence in conservative circles, his close connections with Trump and because of the questions it raised about the escalating toll of political violence that has spanned the ideological spectrum.

"This is our moment: Do we escalate or do we find an off-ramp?" Cox asked, making an impassioned plea for young people to bridge differences through common ground rather than violence. "It's a choice."

New details on evidence

Authorities, who have yet to reveal a motive, described evidence they said shed potential light on the slaying.

That included the engravings on bullet casings, including one that said, "Hey, fascist! Catch!" Cox said.

In addition, a roommate shared with authorities messages from the chatting app Discord that involved a contact named Tyler and discussed a rifle wrapped in a towel, engraved bullets and a scope, the governor said. A Mauser .30-calibre, bolt-action rifle was found in a towel in a wooded area along the path investigators believe Robinson took after firing a single shot from a distant roof and then fleeing.

READ MORE: Everything we know about Charlie Kirk's suspected shooter so far

The clothes the suspect wore when confronted by law enforcement late Thursday matched what he had on when he arrived on campus, and a family member confirmed he drove a grey Dodge Challenger like the one seen in surveillance video that recorded Robinson driving to the university the day of the shooting, Cox said.

Robinson's father recognised him from the photos released by the FBI and told him to turn himself in. Robinson refused at first, but then changed his mind, according to a law enforcement official who spoke on the condition of anonymity to discuss an ongoing investigation. His father contacted their youth pastor, who also occasionally works with the U.S. Marshals and called the agency so Robinson could turn himself in.

Meanwhile, investigators continued to dig into the background of Robinson, who was admitted to Utah State University, about 130 kilometres north of Salt Lake City, on a prestigious academic scholarship, according to a video of him reading his acceptance letter posted to a family member's social media account. However, he attended for only one semester in 2021, a university spokesperson said.

Robinson currently is enrolled in an electrical apprenticeship programme at Dixie Technical College near his hometown, a suburb of St. George in southern Utah.

He is registered as an unaffiliated voter and does not appear to have a prior criminal record. His address was still listed as his parent's home, about a 3.5-hour drive south of the campus where Kirk was shot.

Family members of Robinson did not immediately return messages seeking comment. It was not clear if he had a lawyer.

At his family's home, window coverings were drawn, and a pickup truck blocked access to the driveway. There was a heavy law enforcement presence, with several police vehicles parked along the street, which was closed at both ends.

'He didn't deserve this'

Kirk was a conservative provocateur who became a powerful political force by rallying young Republican voters and was a fixture on college campuses, where he invited sometimes-vehement debate on social issues.

Kirk co-founded the non-profit political organisation Turning Point USA, based in Arizona. He had had been speaking at a campus debate on the first stop of his "American Comeback Tour," at the time of Wednesday's shooting.

He was taking questions from an audience member about gun violence when a shot rang out. Kirk reached up with his right hand as blood gushed from the left side of his neck.

Two days later, law enforcement officers continued to sweep the Utah Valley campus for evidence while the announcement of an arrest brought some relief.

"There's been this like really heavy, dark weight pressed over my heart and soul for the last two days, and waking up to the news of the shooter being captured today, it is a great thing," said Creighton Baird, who was close enough to the stage to see horrific images that continue replaying in his mind.

Trump, who was joined by Democrats in condemning the violence, said he would award Kirk the Presidential Medal of Freedom, the nation's highest civilian honour. Vice President JD Vance and his wife, Usha, escorted Kirk's casket to his home state of Arizona aboard Air Force Two on Thursday.

"He wanted to help young people, and he didn't deserve this," Trump said Friday. "He was really a good person."

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Kirk was taking questions about gun violence

Kirk was a conservative provocateur who became a powerful political force among young Republicans and was a fixture on college campuses, where he invited sometimes-vehement debate on social issues.

One such provocative exchange played out immediately before the shooting as Kirk was taking questions from an audience member about gun violence.

The debate hosted by Turning Point at the Sorensen Centre on campus was billed as the first stop on Kirk's “American Comeback Tour".

The event generated a polarising campus reaction.

An online petition calling for university administrators to bar Kirk from appearing received nearly 1000 signatures.

The university issued a statement last week citing First Amendment rights and affirming its “commitment to free speech, intellectual inquiry and constructive dialogue".

Last week, Kirk posted on X images of news clips showing his visit was sparking controversy. He wrote, “What’s going on in Utah?”

Attendees barricaded themselves in classrooms

Some attendees who bolted after the gunshot rushed into two classrooms full of students.

They used tables to barricade the door and to shield themselves in the corners.

Someone grabbed an electric pencil sharpener and wrapped the cord tightly around the door handle, then tied the sharpener to a chair leg.

On campus Thursday, the canopy stamped with the slogan Kirk commonly used at his events — “PROVE ME WRONG” — stood, dishevelled.

Kathleen Murphy, a longtime resident who lives near the campus, said she has been staying inside with her door locked.

“With the shooter not being caught yet, it was a worry,” Murphy said.

Meanwhile, the shooting continued to draw swift bipartisan condemnation as Democratic officials joined Trump and other Republican allies of Kirk in decrying the attack, which unfolded during a spike of political violence that has touched a range of ideologies and representatives of both major political parties.