Help got scammed!

I should have checked this site first.
I sent a guy who was banned from this site as a scammer a check

He deposited it for $4,000.00

On Wednesday I bought an R3 and some ported w2's with intake from him. ( off racingjunk.com


I have been trying to contact him, he had been telling me his name was Brian Levine

Checks made out to LB performance and mailed to Sonoma California

Shows deposited to a Wells Fargo bank, I'm a contractor and told him I will be heading his way with 5 of my guys if he doesn't respond.

I live near Chicago

His name on here used to be Pwest, I just saw he was banned as a scammer..( holy crap)

Please if a moderator has any info on him I need to get this, as I may have to go to the authorities.