You don't have evidence for what you just alleged, aside from vague, unsubstantiated allegations by Krebs.
Actually, speaking of that one guy, there are very, very few convicted felons with documented mishandling of classified information who get a security clearance under normal circumstances.
1. That there has been no vetting (100% false - FBI vetting began in early December)
2. That they have or need access to any information requiring clearance