Please don’t ask me for a source because I don’t have one, but I distinctly remember reporting about Pence being warned not to trust any unfamiliar secret service agents, and refusing to get into a car after the riot began because he did not recognise the driver.

Edit: Found a source:

After being taken to an undisclosed portion of the Capitol during the riot, Pence’s Secret Service agents, whom Raskin suspected were reporting directly to Trump’s security detail, asked him to enter an armored limousine. The intent, some have theorized, was to drive Pence away from the building, preventing him from certifying the election results, after he had signaled his unwillingness to go against his duties and keep Trump in power.

[…]

“I’m not getting in the car, Tim,” Pence said, in response to Giebels’ insistence that he enter the armored vehicle. “I trust you, Tim, but you’re not driving the car. If I get in that vehicle, you guys are taking off. I’m not getting in the car.”