In his prime they say he killed over 20 men and Tony Accardo was his partner in crime in the 1920s so they must of done a lot of hits together . I think both was on the hit team on valentines day both had the balls and skills to do it and both had skills with a machine gun . Envy killed Mcgurn he was Al favourite when Al went Prison Mcgurn got pushed out by the rest of the outfit then they whacked him he was high risk and had balls and making his moves in there areas .