I agree with Doug. In Texas years ago I think there was a requirement for licensed real estate professionals to disclose a death/murder on a property. Just for grins, you might check state laws regarding any kind of felony disclosure. If they passed your criteria they should be privacy protected. And do not disclose a felon to anyone, like your FRIEND who lives on the property. Gossip can be very hurtful and could provoke some kind of complaint.