Nicky Jacobs punched the air after a jury cleared him of the murder of Pc Keith Blakelock.
He subsequently sat down and sobbed before being taken from the dock.
The 45-year-old's supporters in the public gallery including Winston Silcott - whose conviction for the murder of Pc Blakelock was quashed in 1991 - shouted "Yeah, yeah" and called out "Brother, brother" as the verdict was announced.
Courtenay Griffiths QC, for the defence, said: "I'm delighted, I think the jury reached exactly the right verdicts. Now I have to go and see my client."
More top news
Choudary was jailed after encouraging backing for the terrorist group IS in a series of talks posted online.
In an interview with ITV News, Antonio became the first England player to speak out about the allegations against Sam Allardyce.
It follows a multibillion-pound restoration of the former electricity generator, which has stood unoccupied for decades.