WHO KILLED ANDREW FOSTER KINYON?

According to https://andykinyoncoldcase.wordpress.com/home/status/, Andrew Foster Kinyon was killed on January 22, 1972 by stabbing on the stairwell of the 1367 Grant Avenue building in San Francisco. The article attributes the guilt to the Italian-American robber Eugene Richard Imbrogno Jr., who went around under the false identity of Eugene Santore (source: https://conandaily.com/1984/03/26/eugene-imbrogno-jr-biography -13-things-about-new-york-native/ ). Kinyon felt