India, Dec. 21 -- As authorities continue to investigate the December 14 deaths of filmmaker Rob Reiner and his wife, Michele Singer Reiner, new insight has emerged from a former co-worker of their son Nick. A production assistant who worked with Nick Reiner in 2014, when he interned on the animated sitcom Family Guy, told Fox News Digital that the younger Reiner exhibited troubling signs back then.

The man said that when he and Nick worked together on Family Guy, Rob would drop and pick Nick up every day. "It felt like the family wanted him to succeed, and it felt like they were constantly trying to set him up for success," he recalled. "And he was just this dark, twisted, kind of rough kid."

According to the ex-colleague, Nick, then a...