Looking for Info on Robert Preston Taylor

I used to live in Harford County Maryland from 1976 to 2004..moved to Delaware in 2004, and had a set of twins a {boy and a girl}...if anyone has any questions please feel free to ask..I am currently looking up my grandfathers{Robert Preston Taylor}father{Jeff D. Taylor}and his father{Lindsay Taylor}. The relatives that are still alive dont remember their grandfather{Jeff}, well there is only one that does and she{Aunt Judy}said that he was murdered by his daughter..is there any truth to this? Can someone shed some light on this for me?