A murderer who stabbed a man 80 times and then posed for a picture next to the dead body has been jailed for life at the High Court in Glasgow.
Stephen Price, who carried out the brutal attack on Mr Burgess
Stephen Price, 20, was told he must spend at least 15 years in prison.
He earlier admitted killing 24-year-old Scott Burgess in his Paisley home between August and September last year.
His partner, Karen Duncan, was jailed for seven years for culpable homicide. Her sister, Irene, was sentenced to 27 months in a young offenders' institute.
Karen Duncan and Price posed for a mobile phone picture alongside the victim's body, after they washed Mr Burgess' blood from themselves in a bath.
After the murder, the court heard how they buried their clothing in a black bag along with the murder weapons - a knife and a screwdriver - and the mobile phone.
Bloodstained carpet was cut out and put down a rubbish chute.
Scott Burgess' body was found nine days after his death
The judge, Lord Brodie, said: "It was an unprovoked attack on an unarmed man in his own home showing gross level of depravity.
"You are all young and all had difficult backgrounds.
"You were drinking on the night in question. However, that may explain your behaviour, but provides no excuse."
He told Price: "You planned to assault Scott Burgess in his own flat.
"Once inside you locked the door and carried out a very long and unprovoked attack and I can see no reason for it whatsoever."
Derek Ogg QC told the court there was no motive for the horrific crime apart from the fact that Price believed Mr Burgess had made some derogatory remarks about his friends.
"So furious was the assault Price managed to stab himself in the arm," he said.
The scene of the knife attack at Mr Burgess' home in Paisley
"Mr Burgess collapsed into unconsciousness or death and Price then posed with his body, brandishing his knife and smiling whilst one of the Duncan girls photographed him on a mobile phone camera."
Paul McBride QC, representing Price, said: "It will be of little or no consolation to those who loved Scott Burgess, but Mr Price says he wishes me to express his deep heartfelt remorse for what he has done."
Irene Duncan had admitted attempting to pervert the course of justice.
The 18-year-old will be supervised for a year after her release.
Price's 17-year-old girlfriend admitted culpable homicide after twice stabbing Mr Burgess with a screwdriver.
She will be monitored in the community for three years after her release.
QCs Frances McMenamin and Donald Findlay, who represented Karen Duncan and Irene Duncan respectively, said that they become involved because of drugs and coercion by Price.