In an online hacking mission, how do I check for people in cars?

A guy hacked my game, and I couldn't find him. At the end, it showed me he was in a van. I ran around the van about 5 times during the time I was playing with my scanner out and pointing at it and nothing registered. What was I doing wrong?


He was lying down in the car.

In your own car missions, you have the option to "hide" in a car. You need to keep an eye out for driver seats that are lowered and walk up to the car before you can scan him.