Royal Canadian Mounted Police investigators search for evidence at the location where Constable Heidi Stevenson was killed along the highway in Shubenacadie, Nova Scotia on Thursday, April 23, 2020. Police say the man who went on a murderous rampage through five Nova Scotia communities was likely using unlicensed firearms, and investigators are trying find out how he obtained illegal weapons. (Andrew Vaughan/The Canadian Press via AP)