A Louisiana sheriff says the shooting of one of his deputies was a "cold-blooded murder."

Sheriff Newell Normand told reporters how a suspect who was about to be searched by Detective David Michel suddenly flipped around and shot the officer.

As Michel was going down the sheriff said the shooter fired two more shots into the deputy's back.

Authorities later found and arrested 19-year-old Jerman Neveaux. He's being held on charges of first degree murder and assault.

The sheriff says Neveaux was on probation and wasn't supposed to have a gun and that's why he shot the officer.