Not sure if "homicidal" = "psychopath". It's a fraught task to make a mental health diagnosis beyond the grave, this book is probably the state of the art

https://malorbooks.com/titles/sounds-from-the-bell-jar-clari...

but it covers "serious mental illness" which is inclusive of schizophrenia, bipolar and psychotic depression. No way you can diagnosis psychopathy by looking at bones.