No gunshot residue (GSR) was found on a black cap police believed was worn by the man who shot Damian Trotman in Sheraton Mall over two years ago.This was revealed by forensics expert Marsha Skeete who said the tests conducted on the cap that was presented to the lab by police in April 2019, came back negative.She was giving evidence in the No. 3 Supreme Court on Thursday as the murder trial of Hakeem Roberto Stuart continued.Stuart, 24, of Shelbourne Gap, St Lawrence, Christ Church is accused of murdering Trotman on March 21, 2019.When questioned by State Counsel Romarioa Straker, Skeete, who is the Head of Chemistry and Senior Forensic Scientist at the Forensic Scientist Center, told the court the cap was analysed for DNA and GSR.