Police release report in Markquett Martin shooting, say sole shell casing was from Martin's gun Catherine Steward/WTVF and last updated 2021-02-12 13:06:40-05 NASHVILLE, Tenn. (WTVF) â The Metro Nashville Police Department has released its ballistics testing report in the Markquett Martin shooting. The department released its findings from the shooting on Friday, saying the "sole shell casing recovered from the scene was fired by the semi-automatic pistol Martin was carrying." Police called the shooting a "self-inflicted gunshot death." Additionally, police said impact testing showed that the gun would not fire without the trigger being pulled. Investigators said "no officers fired their weapons or used force."