Well the neighbor claims to have reported the truck, but now I see that he didn't because his phone wasn't working. The pizza owner said that he went on Tuesday to check out the truck, but to my knowledge I don't think I've heard him say that he reported it.
If you listen to the 2 police officers, they don't say that they were at this apartment complex on a tip about this truck. They were there on a different matter.
I don't know what the officers say in the Oprah interview, as it hasn't aired here yet.
I believe the police officers only credit Mitchell on the show, but I could be wrong. It is on at 4 here. Since there is a reward involved, I suppose some may want to claim it?