By Brittany Hobson The Canadian Press The opening day of the murder trial of Jeremy Skibicki heard he targeted vulnerable Indigenous women at Winnipeg homeless shelters and, while being questioned by police in one gruesome killing, blurted out that there were three more victims. “I killed four people,” Skibicki is heard telling police unprompted in an interrogation video played Wednesday at the trial in Court of King’s Bench. Skibicki is charged with four counts of first-degree murder for the slayings in the early months of 2022. The 37-year-old has pleaded not guilty. His lawyers told court earlier this week Skibicki admits to the killings but is not criminally responsible due to mental illness. “This case is about a man’s hate-filled and cruel acts perpetrated against four vulnerable Indigenous women,” prosecutor…