Looking for my father?

I'm looking for my father who I haven;t seen since 1986 in Miami, Fl. His name is Mark R. King and he's a white male, around the age of 56, brown hair and hazel or green eyes. He was born in Detroit but I believe his family lives in the southern Indiana or Kentucky area. His mother's name is Phyllis May or May Phyllis. I know he has a brother name Mathew and a sister name Rebecca. Hopefully someone out there can give us some information on his whereabouts. Thank you.