On January 1, 2007, Marshall was present at The Shelter, a nightclub in Denver, Colorado, along with teammates Javon Walker and Darrent Williams. The trio was attending a birthday party held for and by Denver Nuggets forward Kenyon Martin. As the players were leaving the club in a limousine, Williams was fatally shot in the neck after an unknown assailant opened fire on the vehicle. Willie Clark was later charged with the murder. Walker has stated in interviews that the shooter was likely a nightclub patron whose motive was retaliation after being involved in an altercation with Marshall's cousin earlier that night.