Delaware state trooper tried to turn off body camera before 'brutal' assault on teen: prosecutors
Police lights (Shuttershock)

A Delaware state trooper who allegedly "brutally beat" a 15-year-old boy who played a "ding-dong ditch" prank has been charged with multiple felonies, NBC 10 reported.

Dempsey R. Walters, 29, was charged with second-degree assault, a felony; deprivation of civil rights, a felony; two counts of third-degree assault, misdemeanors; and two counts of official misconduct, as well as other misdemeanors.

Officials say Walters was on duty when the incident occurred but turned off his body camera during the assault, but the device still captured video with no audio.

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The video shows Walters walk up to the boy, who was handcuffed and sitting in a police car, and strike him in the face.

"Please tell me what I did? Please tell me what I did?" the boy asks.

Attorney General Kathy Jennings said Tuesday that the man "chose to extract his own form of personal justice" by "embarking on a violent rampage."

“As a mother and grandmother, the footage in this case is hard to watch," Jennings said Tuesday. "As a prosecutor, the constitutional violations are stunning."

Read the full report over at NBC 10.