Three boys have been detained for kicking to death a Big Issue seller in a "chillingly casual" attack.
The body of Ralph Millward, 41, was found in bushes in Bournemouth last year. A supermarket trolley had been dumped on top of him.
Jimmy Ayres, 15, Craig Real, 17, and Warren Crago, 17, were convicted of manslaughter last month.
Ayres was detained for 90 weeks, Real for four years nine months and Crago must serve four years.
They were cleared of murdering Mr Millward, who had been sleeping rough outside Marks and Spencer in Westbourne.
The trial heard the four youths had bought and drunk two bottles of cider and two bottles of vodka on the night of 7 May.
Mr Millward was discovered lying dead in bushes by two outreach workers the next morning.
He had died from multiple blunt force injuries and was found with a supermarket trolley on top of him.
Judge Guy Boney described the attack as a "mindless and chillingly casual" act of violence.
He added it was an utterly merciless killing and a wicked act.
But Mr Millward's father Ken, who lives in Boscombe, said he was "disappointed" by the sentences.
Ayres, of Aspen Gardens, Crago, of Arne Crescent, and Real, of Turbary Close, were convicted at Winchester Crown Court.
A fourth teenager, who was with the group the night Mr Millward died, told the court he had tried to stop the attack.
Det Insp Jez Noyce, of Dorset Police, said: "The senseless acts of a small group of boys led to the death of Ralph Millward... boys who had no thoughts of the consequences of their actions.
"It would be a sad indictment of society should this mindset be allowed to flourish unchecked.
"This conviction and sentence should serve as a warning to those who feel they can go through life abdicating responsibility for their actions and not then face the consequences."