Two St. John Parish deputies were shot and killed while interviewing suspects in an earlier shooting of a deputy at the parking lot for contractors at Valero Energy.

Working on tips from a civilian and another officer, a vehicle similar to the suspect's was spotted and tracked to a trailer park.

Tregre said that deputies knocked at the door and had two people come outside for an interview about the shooting. He said at that time, a third suspect exited another door and shot the two officers to death in what he described as a 'ambush.'

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