A retired NYPD detective spoke with News 12 Friday to explain the steps the department takes after incidents like Thursday’s police-involved shooting.

On Thursday around 3 p.m., police pulled over Allan Feliz, 31, for not wearing a seat belt in Norwood. Police say they saw three open warrants when they ran Feliz’s information. Things escalated quickly, and the officers say they had to jump out of the way to avoid getting hit by the vehicle. Police say Feliz resisted arrest. He was shot with a Taser and was ultimately shot to death by a sergeant.

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Retired Detective Joe Thompson says police will right away protect the scene and that a careful search is conducted to gather evidence. Back at the precinct, he says everyone involved is interviewed separately and statements are taken so there’s a record of what happened. Body camera footage is reviewed too.

"And then they probably put the officer on modified duty and usually after a shooting a police officer goes for trauma, therapy, that kind of thing,” says Thompson. “Because it's traumatic, you shoot somebody — and unless you're a crazy person — it's traumatic."

There is no word yet from the NYPD if the sergeant involved is on modified duty.

Thompson says new protocol may be implemented following an investigation, in an effort to avoid future incidents – but it’s common for it not to be followed because police have a split second to make a life-or-death decision.