This is a very serious allegation. Therefore, your friend has only one thing to do. He needs to hire a very serious attorney to handle this in a very professional way. Give me a call and we can discuss the situation. Joseph Chancellor (617) 725-2675 www.chancellorlaw.com
I can only agree with Mr. Chancellor, though I can't vouch for him personally (he certainly seems well qualified, I am only saying I don't know him!) -- in either event you must get a attorney who is knowledgeable about defamation law and criminal law on this, and very fast.
Sign up to receive a 3-part series of useful information and advice about personal injury law.