The grandson of Sheffield football legend Derek Dooley was part of a group of Owls fans "hellbent on violence against the police" when the team was relegated last year, a court heard.
The 22-year-old - also called Derek Dooley - was caught on police cameras raising a large stone above his head and smashing it onto the tram tracks in Middlewood Road, Hillsborough.
Sheffield Magistrates' Court heard another Owls fan then picked up half of the stone and launched it at police officers in riot gear, who were trying to contain a group of up to 150 supporters on the rampage after their club's 2-2 draw with Crystal Palace last May.
Dooley, of Meadowhead Road, Meadowhead, had earlier taken part in a pitch invasion at Hillsborough Stadium, in which fans from the two sides brawled on the turf and hurled abuse at one another.
The court saw CCTV footage of Dooley holding the rock, his face partly covered with a scarf - which the prosecution say was intended to conceal his identity. Dooley, who denies threatening behaviour, said smashing the rock was a "wrong decision" and a "stupid mistake", but he had no intention of throwing it or causing damage with it.
The trial was adjourned and will continue next Monday.
Read more of this story in The Star today - Wednesday, January 19, 2011.
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