Langan Ancestry

I am trying to find out any information that I can about a Robert J Langan, who apparently is my real father. I was in the process of researching my ancestry on what I thought was my father's side and discovered legal documents showing my mother and alleged father was divorced 5 years before I was born. Furthermore, shortly after the divorce the alleged father moved to California.

Then the next legal document that I discovered was a lawsuit to establish Paternity against Robert J Langan in 1967. Even though he tried to deny the claim he settled after the blood work came back. He never denied sexual contact with my mother in the court documents, but only did not want to take responsibility for a child.

What I know is that in 1966 he was either employed or had some kind of ownership with Langan's Norwest Lanes & Pizza in Farmington Hills, Michigan. According to the court documents he lived in Southfield Michigan but no address was given.

I am trying to piece together my ancestry on my Father's side so any information would be appreciated. I have already contacted Langan's Norwest Lanes and it did not produce any results.

Thank You for any help or suggestions.