(Reuters) - A Louisiana sheriff's deputy died of gunshot wounds on Wednesday after being shot three times in the back by a pedestrian he had stopped in a high-crime suburb of New Orleans, the Jefferson Parish Sheriff's Office said.

Sheriff Newell Normand told reporters at a late night news conference that deputy David F. Michel, Jr., 50, got into a struggle with the suspect around noon local time, believing the man was following another individual.

Normand said the suspect, identified as 19-year-old Jerman Neveaux, pulled a revolver and fired a total of three shots into Michel's back during the confrontation.

Michel, a detective who was assigned to a street crimes unit, died at a local hospital.

"David, I wish I had 1,000 of him," an emotional Normand said, adding that the shooting was "a cold-blooded murder."

Neveaux fled into the surrounding neighborhood and was later apprehended.

Bystander video published online by local broadcaster FOX8 showed two of several officers striking a prone Neveaux more than a dozen times as he is arrested, footage which Normand said his office would investigate.

Neveaux was treated for minor injuries at a hospital. Normand said Neveaux admitted to the shooting, saying he was on probation and did not want to go to jail for possessing a firearm.

Michel worked as a reserve deputy for the department starting in 2007 and became a full-time deputy in February of 2013, the office said.

(Reporting by Letitia Stein in Tampa, Florida and Curtis Skinner in San Francisco; Editing by Richard Chang and Sandra Maler)