I guess you could do that. The key difference between this and the Stingray parallel construction is that the random bystander is a legitimate witness with no c

I guess you could do that. The key difference between this and the Stingray parallel construction is that the random bystander is a legitimate witness with no connection to the police. Now if the police called up some friend and said, "Hey, I meet me on the corner of blah and blah at noon tomorrow, knowing that a crime was going was going to take place there and then, then that's something else.