After seven months, their carefully thought-out final plan included the kidnapping and killing of Bobby Franks and collection of ransom.
On May 21, 1924, Leopold and Loeb went in their car and tried to convince Bobby Franks to get in the car. After a few tries, he did.
After they finally got Bobby into the car, Loeb hit Franks in the head repeatedly with the chisel, then choked him to death and disposed of his body.
Their plan began to fall apart when the ransom idea collapsed and someone found Bobby Franks's body. A formal police investigation was then launched.
Loeb confessed to the plot but said that Leopold had killed Bobby, while Leopold said Loeb did it. They were then sentenced to life plus 99 years in prison for the murder and kidnapping of Bobby Franks.
After 12 years in prison, Loeb was murdered by another prisoner. After 33 years, due to model behavior, Leopold was eventually released early. He wrote a novel about the murder and tried to start a foundation for troubled youth. He moved to Puerto Rico, where he married lived a good life as a teacher until his death in 1971. Although this crime was the first of its time, it was not the last. Its influence can be seen today, primarily in literature with crime novels and other modes of entertainment.