For one of the schools in my education section of my clearance, I was planning on listing a friend I knew at the school. The problem is that friend was arrested and charged with a felony about 2 years ago. He was a first-time offender so he received only probation and he had to attend some form of program once a week for a year. After he completed the program and probation, his records were recently expunged. I still see this friend periodically and I'm not really in contact anymore with anyone else at the school that I could use as a reference.
Will his background hurt my chances at getting a clearance, both secret and top secret?