The murder trial of the man accused of shooting and killing a security guard onboard a party vessel three years ago got underway today.When he was arraigned today before Justice Carlisle Greaves in the No. 3 Supreme Court, Rommel Cummins, 30, of Vauxhall No. 2, Christ Church, pleaded not guilty to murdering Dave Archer on June 10, 2019.Archer, who was 32 years old at the time of his death, was working as a private security guard on the MV Dreamchaser when he was gunned down around 10:35 p.m.