Rob and his son got into a heated argument during the party, with one guest alleging that Rob told his son that his behavior was inappropriate. Another guest told The New York Times that Nick seemed anxious and uncomfortable throughout the night, “in a way that deeply unsettled them.”

The footage, obtained by NBC Los Angeles, shows Nick Reiner, 32, being confronted by four police vehicles on Sunday night.

The young Reiner reportedly peppered Bill Hader and others with annoying queries at the A-list bash before he allegedly murdered Rob and Michele Reiner.

One of the newly released videos appears to show Nick Reiner, 32, moments before his Dec. 14 arrest near the University of Southern California. In the video, he's wearing jeans, a striped jacket and a baseball cap. He's seen with a red backpack slung over one shoulder as he enters a gas station and purchases a drink.

Nick Reiner, who is accused of murdering his parents Rob Reiner and Michele Singer Reiner, will not be in court on Tuesday due to medical reasons, his attorney Alan Jackson said.

The family instructor tried to make the best of his behavioral issues by channeling them into 'A Chair in the Air.'

The Texas-raised attorney is representing Nick, who is accused of murdering Rob, his father and the film's director