Walter petersburg who is buried in a michigan prison, was 128 years old, who was he.?

While looking up on the internet, I discovered that St Valentine shooter, "Killer Burke" died in a Michigan Prison. I went to the cemetry site and discovered that another grave was in the cemetry, that being of Walter Petersbrg. The fact that they had him being 128 years old when he died, may me ask the question "why was he buried in this cemetry". A prison cemetry is usally for prisoners, I would like to find out who he was and what he did. If a prisoner who was to serve natural life, then this really could be more interesting. Who is he, what did he do, and was he 128 years old when he died.