Smith said Saturday's party was a catered event, and that alcohol was being served.
He said he and other facility staff were cleaning up in the kitchen at the time of the shooting and that when he came to the front of the building police were already working the scene outside.
Court records reveal Huddleston had a history of run-ins with law enforcement, with felony convictions dating to 1996. He completed a two-year sentence on a 2009 felony escape charge in July.
Anyone with information can call the homicide tip line 297-1200. Callers can remain anonymous and may be eligible for a cash reward.