OP, in light of some of the opinions and assumptions made here, at the end of the day my opinion means nothing; I am and not you and vice versa.
You mention this guy has fronted a previous band with a "good following". Was this years ago, or recently? If the latter, plenty of folks could have googled his name and found the exact same thing. Was it an issue?
This IS your business. It's the band you are in (doing business soon) so you have the right, if you choose, to look into someone's background. Also, this is public information. Period. You are fully allowed to access such information. In my day job, an individuals' past is a BIG consideration when hiring. Will his past be an issue if it blows up? How would it affect you, the band, or even the venues you play, should something happen - even if the 'happen' is the word is spread publicly? Much like this thread, the court of public opinion might mean more than any level of reality. This is why I would proceed cautiously. Bow out, or ask him directly and express your concerns politely. I don't think you have much choice knowing what you know.
But again, this is my opinion.
You mention this guy has fronted a previous band with a "good following". Was this years ago, or recently? If the latter, plenty of folks could have googled his name and found the exact same thing. Was it an issue?
This IS your business. It's the band you are in (doing business soon) so you have the right, if you choose, to look into someone's background. Also, this is public information. Period. You are fully allowed to access such information. In my day job, an individuals' past is a BIG consideration when hiring. Will his past be an issue if it blows up? How would it affect you, the band, or even the venues you play, should something happen - even if the 'happen' is the word is spread publicly? Much like this thread, the court of public opinion might mean more than any level of reality. This is why I would proceed cautiously. Bow out, or ask him directly and express your concerns politely. I don't think you have much choice knowing what you know.
But again, this is my opinion.