Donna Lee Dustin Cold case

Hey! I’m trying to get as much Information on this case as possible. A 17 year old girl was murdered in Maryland in 1973. A picture of a car that was where her body was found was recently released. That car was my great uncle Steve’s car, and he is now the primary suspect. He is long dead and gone now, but I want to know what happened and if there is any way to confirm it was him and bring this girl some justice. If you have any links to articles or evidence, please leave it in the comments. Thank you.