A police car dash cam is always running, or they could use a news copter. Plenty of safe ways to get footage. This is a city, so people in upper floors of tall buildings can see and have nowhere to run.

Worst case scenario: Teflon cloaks and derps for a few hours until footage is shown of the kidnapping recovered from a smartphone or dash cam.

If I save him, Garrett will work his way home, ostensibly to get him the best medical care but also giving me a satisfactory and plausible way to retire Garrett and intorduce his replacement.