At 50, Lt. Nolan Anderson of LaPlace, La., had spent half his life as a member of the St. John the Baptist Parish Sheriff's Office. Now, the Louisiana State Police is attempting to piece together the tragic series of events that led the 25-year veteran -- on duty and in uniform at the time -- to be shot and killed by colleagues after authorities say he opened fire on deputies who were responding to reports of a domestic dispute between Anderson and his wife Wednesday afternoon.

"We don't know what led to the altercation" between the couple, State Police spokeswoman Trooper Melissa Matey told NOLA.com . "We are in the preliminary stages of the investigation, there are a lot of interviews that need to take place, a lot of evidence that need to be collected."

Initial reports indicate that the deputies were responding to a 911 emergency call shortly before 2 p.m. regarding a domestic dispute involving Anderson and his wife at a house on Pine Street in LaPlace where the couple's adult daughter lives.