Marlon Ledesma found guilty of beating cellmate to death in Calgary Remand Centre
Convicted of second-degree murder in killing of Alvin Chiniquay
Marlon Ledesma killed Alvin Chiniquay, 40, in September 2016.
Justice Kim Nixon heard evidence earlier this month during Ledesma's first-degree murder trial.
Nixon convicted Ledesma of the lesser offence of second-degree murder after the judge ruled it would be "speculation" to find Ledesma planned to kill his victim.
Video of attack
During the trial, prosecutor Todd Buziak presented a video that showed the cell shared by Ledesma and Chiniquay.
The first attack began at 9:16 a.m. on Sept. 9, 2016, and lasted about two minutes, until Chiniquay appeared to have a seizure or convulsions.
Then Ledesma is shown going after Chiniquay again, this time for about seven minutes. At the end, Chiniquay appears to be unconscious.
The guard who answered Ledesma's call testified the killer told him he was hearing voices.
Chiniquay died days later in hospital.
Mental health concerns
At the time of the killing, Ledesma was at the remand centre awaiting trial on charges of aggravated assault. He has since been convicted of those offences as well.