Elsa Crystal was the wife of a clerk named Claude Crystal, who was deep in debt. When Claude robbed his employer, he planned on leaving his wife and daughter. Elsa found out about this and drugged him with a strong sedative, rendering him unconscious. She and her brother Robie then put Claude in their freezer where he froze to death.
Elsa took the money Claude had stolen and started paying off their debts. Dick Tracy managed to figure out her involvement. In desperation, Elsa killed her brother so she could keep the money that she had given him. She hid at a local drug ring's hideout, but was soon apprehended by police.