<human>: Can you condense the text into a few key points?

The nonprofit I work at has recently sent out an email saying that they have hired a local student as a paid intern. I recognized the name and I have heard of him from several different people in the past (from as far back as 4-5 years ago to this most recent year), that he is a drug dealer. I have no idea if he currently as of this moment deals, uses hard drugs or if he is involved in any other criminal activities. 

I am really troubled by this because in my line of work people are often very giving and taking people at their face value etc. etc. and I am worried that he may take advantage of this amongst our staff, volunteers and donors who are usually rich elderly women. From what I have seen of him from afar (I have been in the same room with him while he's spoken with other people I've known) he is quite the scheister. While being smooth and sociable with people is a good quality to have in this type of job I am worried what that might mean if he is willing to break the law for 'get rich quick' type thinking and will be dealing with large amounts of cash.

Do I speak up and cause drama? 
I am recently hired this year as well, but the people who hired him have just moved here and hired him within weeks or days of being on the job themselves.

or 

Keep my mouth shut? .. and let my coworkers wonder why I don't like him and think I'm a bitch and eagle eye for any sort of exploitative behaviour (this job environment is rife for it in certain ways) in the meantime. 

It makes me very uncomfortable, I do want to give this person a chance in case they have changed their ways but I am worried about being played for a chump. Also if I the most straight laced girl in the world knows who this guy is I'm worried about how his known reputation will affect our image within the local community.
<bot>: Work is hiring a guy who used to deal a lot of drugs but has managed to get hired because we don't do police screening. Noone knows but me. What do I do?