Suicide Beat!

The 'suicide beat' is a neighborhood run by a crook, Fancy Dan. Any cop that gets information on him is killed, but they can't make anything stick on him, because he is supported by the crooked political boss of the neighborhood.

Another officer, Kelly, is put on the beat, but he isn't put out--he's too pleased that today his son, Jimmy, is becoming a cop. Predictably, he's killed that night, and Jimmy demands to replace him on the suicide beat, swearing that he'll get Fancy Dan.

Between Batman and Jimmy, they expose Fancy Dan, and Jimmy becomes a hero.

Notes

A cop named Grogan is killed. The brothers in Brothers in Crime were Mike and Tommy Grogan, and Butch Grogan was a gang leader in Superman and the Skyscrapers. It's the name of a counterfeiter in the Speed Saunders Detective Comics #19, too.

Kelly sings a line from "Colleen Bawn" and then one from "Did Your Mother Come from Ireland" (a song by Bing Crosby popular in 1941).