Not too old to hang.
I love it when they finally catch killers..... I don't care how long it takes.
The biggest unsolved murder in my area was the Evelyn Hartley case which happened in 1953 not too far from my home. The fifteen year old high school girl was abducted from a home where she had been babysitting.
There were only a few articles of male clothing possibly related to the crime that were found and blood on a basement window casing. Bloody hand prints were also found in the yard and around the house where the kidnapping took place.
I don't know if DNA could work on those articles after all these years, or even if they've ever been tested.