[Peach]

Could be a deliveryman and people tend to dis-regard those in uniform.

[Jaidyn]

I think these guys are legitimate delivery men who don't work workends unless the boss asks for overtime. Then, perhaps we will see weekend killings.

[Catspaw]

It could be deliverymen, repairmen/handymen, plumbers/electricians, cable/phone installers--any occupation that gives that kind of mobility, and who could blend into the background.

[TC Rider]

Could be a deliveryman and people tend to dis-regard those in uniform.

How about a yuppy diaper service? Who'd want to search that van?