Tommy James did better than some. Walter Scott, who was the singer of the above hit, was murdered by his wife and her lover, and his body spent four years in a cistern. They also murdered the lover's wife. The wife was only given 18 months.
Then there was Bobby Fuller (of I Fought the Law fame):
https://faroutmagazine.co.uk/the-strange-death-of-bobby-fuller/
Well, that is worse. Having grown up in the St. Louis area, I am familiar with Bob Kuban, but I had forgotten what happened to Scott.