Buying from a seller with a $hady past

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Hey BP,

I'm considering placing a bid on a condo from a seller/developer who pled guilty to bid rigging and fraud conspiracy at foreclosures in 2015. I didn't find this out until literally the 11th hour (more like the 14th hour-- offers are due at 2pm today), but I'm wondering how seriously this should impact my thought process. Is my money safe in case he tries to pull something shady after this transaction? Does anyone have experience with this type of situation, or with this guy Mark Roemer? 

Here's the article explaining his legal troubles