In February 2020, Ahmaud Arbery was shot and killed in broad daylight while out for a run in a South Georgian town in the US.

Now, over a year later, three men have been convicted of his murder, after shooting and chasing the 25-year-old through their neighbourhood.

Gregory McMichael, 65, his son Travis McMichael, 35, and their neighbour William "Roddie" Bryan, 52, have been sentenced to life in prison for the murder, aggravated assault, false imprisonment and criminal intent to commit a felony.

Here's everything we know about the case.

WATCH: Ahmaud’s family is demanding justice. Here’s their lawyer. Post continues after video.

What happened to Ahmaud Arbery.

In May 2020, months after the murder, a graphic video of the incident, filmed by an anonymous source, was posted on Twitter and then deleted, but not before it quickly went viral.

In the video, a Black unarmed man in exercise clothes can be seen running along a street in Brunswick, Georgia, at 1pm, before a white pickup truck blocks his path. One white man is standing next to the driver’s door while another is perched in the vehicle’s flatbed.

The view is obstructed for a few minutes, and some shouting can be heard. The video then shows the Black man trying to run around the truck before a gunshot rings out. He and the white man on the road engage in a struggle before another shot is fired. A third gunshot hits him, and he falls to the ground.

25-year-old Ahmaud died at the scene.

For two months, neither of his pursuers, a father and son named Gregory and Travis McMichael, were arrested or charged, even though Gregory admitted to police that Travis was responsible for the shooting.

They told police that Ahmaud resembled a suspect that had committed burglary in the area, with a police report obtained by the New York Times quoting that Gregory "was in his front yard when he saw Arbery hauling ass down the street, and called to Travis, 'The guy is running down the street, let’s go'."

The McMichaels got in their pickup truck, armed with a 357 magnum and a shotgun, and began chasing Ahmaud through the neighbourhood.

A jury found the three white men accused of killing Arbery guilty on most of the 29 charges they faced the day before Thanksgiving. https://t.co/XvIasZHYMR

— WGRZ (@WGRZ)

They told police they called out to him and said "stop stop we want to talk to you," and when Travis exited the vehicle to approach, Ahmaud "attacked" him.

During a struggle over the gun, the report states, Travis fired two shots.

Police ultimately decided not to press charges because "the men who shot Arbery were compliant with Georgia’s open carry law, as well as laws regarding both citizen’s arrests and stand-your-ground," reports The Cut.

But as the attorney representing Ahmaud's family points out in a statement:

"The video clearly shows Mr Arbery jogging down the road in the middle of the day. Two armed assailants, known to be Gregory and Travis McMichael, are parked ahead of Mr Arbery. Mr Arbery makes multiple attempts to avoid the armed strangers before the first shot is heard. Mr Arbery then appears to collide with the attacking gunman, now known to be Travis McMichael. Mr Arbery then struggles for the gun and in defence of his life. At this point Travis McMichael shoots Mr Arbery two additional times with a shotgun at point-blank range.

"Mr Arbery had not committed any crime and there was no reason for these men to believe they had the right to stop him with weapons or to use deadly force in furtherance of their unlawful attempted stop. This is murder."

The mother of #AhmaudArbery had to wait 74 days before her son's murderers were arrested, after prosecutors allegedly shielded them from charges. pic.twitter.com/k2PbiCoZVZ

— AJ+ (@ajplus)

"He was out for his daily jog and he was hunted down like an animal and killed," his mother added, while being interviewed by CBS.

In May, Gregory and Travis McMichael, and their neighbour William "Roddie" Bryan, were eventually arrested. Bryan had joined the McMichaels in their pursuit and recorded Ahmaud's final moments.

The court case hinged on whether the three men, under a now-repealed Georgia law permitting citizen arrests, had a right to confront Arbery on a hunch he was fleeing a crime.

The reactions to the guilty verdict.

US President Joe Biden said that while the verdict reflects that the US justice system is "doing its job", no one should fear violence "because of the colour of their skin".

"Nothing can bring Mr Arbery back to his family and to his community, but the verdict ensures that those who committed this horrible crime will be punished. While the guilty verdicts reflect our justice system doing its job, that alone is not enough," he said in a statement.

"Instead, we must recommit ourselves to building a future of unity and shared strength, where no one fears violence because of the colour of their skin."

US Senator Raphael Warnock and Bernice King, the daughter of Martin Luther King Jr, are among many who also reacted to the news on social media.

I'm grateful to the jury for their service and for a verdict that says Ahmaud Arbery’s life mattered. He was a son, a nephew, a child of God, and he did not deserve to die in this way. I'm praying for Ahmaud’s family as they begin the difficult journey towards healing.

— Reverend Raphael Warnock (@ReverendWarnock)

#AhmaudArbery should be here. The McMichaels and Bryan are indeed guilty of taking his life for no other reason than for him being Black. I’m praying for and thinking of Ahmaud’s family, including his mother, Wanda Cooper-Jones, who in this moment, is still missing her son. pic.twitter.com/JNKCzfSXP8

— Be A King (@BerniceKing)