Surveillance footage shows the moment Nick Reiner was swarmed by police and arrested for allegedly murdering his parents, Rob and Michele Reiner.

The NY Post obtained video from Nick’s Sunday arrest near the USC campus in downtown Los Angeles … and you see Nick standing on the corner when a bunch of police cars pull up, and officers hop out and throw him in a pair of handcuffs.

LAPD released still images from the arrest Monday, but this is the first video to emerge.

Nick was charged Tuesday with two counts of first-degree murder in the deaths of his famous parents.

Los Angeles County District Attorney Nathan Hochman says Nick faces the possibility of life in prison without parole … or the death penalty … if convicted on all counts.