This is what cracks me up about people.
I'm a PI. My job is surveillance.
People in a neighborhood always assumes I'm Secret Service or FBI or whatever.
I always inform them, if you're seeing me, I'm not watching you. The person I am watching never sees me.
People make a lot of false assumptions about surveillance vehicles. It's most likely. a Work comp or Infidelity case. Most likely its just a PI. Most likely he's not watching you.