I really doubt they solved it ,
Mickey was an bastard in business, Goodwin no better,
They never found the killers , just "proved" Goodwin hired them....ummm
no killers means to me its not solved,
There were other rumors back then on who did it , but its been to long for me to remember ,
Goodwin and Mickey had business problems YES,
but murder solved , not really
Beaulieu