Moment drug dealer executes American cop at side of road after slyly getting out of his pick-up with an AR-15 during traffic stop - before 40-mile chase that ended in a hail of police bullets

Seconds before the officer had asked Cueva - who was on his way to a drug deal - to hand over his rifle, which appears to have sparked his murderous act.

Sickening footage shows violent criminal Omar Felix Cueva, 39, jump out the driver's side of his Chevrolet pick-up truck with an AR-15-style rifle before firing a shot at officer Darian Jarrott

Cold-blooded killer Cueva (left) and Jarrott (right), who was described by colleagues as a 'hero'

Jarrott stopped Cueva, who police say had a 'violent criminal history' including drugs charges involving cocaine and meth, on February 4 on the eastbound Interstate 10 between Deming and Las Cruces after noticing his windows were tinted.

After walking over to the passenger-side window of Cueva's white pick-up, footage shows the officer saying politely: 'Good afternoon, sir. My name is Darrian Jarrott. I'm with New Mexico State Police. The reason for the stop is your window tint is a little too dark.'

Cueva then mutters something intelligible - lapel and patrol car video released by police shows.

Jarrott, a father of three small children whose partner was pregnant at the time of his death, says: 'Yeah, mind if I open the door? Or if you want to roll down the window more.'

In a brief conversation lasting around three minutes, the officer asks if Cueva had insurance, to which he replies 'yes', and confirms his name, before asking the criminal to come over to his patrol car so he could run checks.

Cueva opens his door, at which point Jarrott notices his rifle and asked, 'You have a firearm on you, do you mind if I take that off you, for my own safety?'

The officer then says, 'Let's go to my vehicle OK', at which point Cueva gets out from the driver's seat holding the rifle - which Jarrott is unable to see because his view is blocked by the pick-up.

The moment before the shooting, showing Cueva opening the driver's door of his truck with Jarrott on the other side. Source: Police Activity YouTube 

As both men slowly walk parallel with each other towards the patrol car, Cueva suddenly draws the rifle, with Jarrott shouting 'oh s***' before being hit

The criminal then shoots him several more times off the camera and slowly pulls away, leaving the officer's dead body by the side of the road (right - obscured by pixelation) 

As both men slowly walk parallel with each other towards the patrol car, Cueva suddenly draws the rifle, with Jarrott shouting 'oh s***' before being hit.

The criminal then shoots him several more times off the camera and slowly pulls away, leaving the officer's dead body by the side of the road.

Less than a minute after Cueva fled, a Homeland Security Investigations agent arrived on the scene and notified dispatch that Jarrott was down.

A 40-mile chase ensued, during which Cueva exchanged fire with officers from New Mexico State Police, the Cruces Police Department, the Dona Ana County Sheriff's Office, and US Border Patrol.

Cueva's truck is seen reversing wildly down the highway after being spun out by a patrol car.

Cueva leaps from the truck with his pistol drawn and crouches behind the hood of a police car as an officer kneels opposite him behind the trunk.