Abbott and Costello Meet the Invisible Man

The name of this movie is Abbott and Costello Meet the Invisible Man released in 1951-03-07 and it's main theme is Boxer Tommy Nelson is accused of killing his manager. While detectives Bud and Lou investigate they come across an invisibility formula with which Tommy injects himself rather than face the police. This sparks an idea for trapping gangster Morgan by having Lou fight champ Rocky Hanlon, with Tommy's invisible help.