You should consult an attorney - the issue of whether you left the premises may be of concern unless the allegations are that you were concealing...

Is it in our best interest to get a lawyer for an internal hearing at a college?

Yes, an attorney is needed. While this is only an "internal" hearing and your family member may have valid explanations to support his story,...

Should i get a Lawyer befor i turn myself in

You should only attempt to turn yourself in after speaking with a competent attorney. He/she should advise you on this issue and should accompany...