Barbara and Patricia Grimes' disappearance led to hundreds of police officers searching Chicago and even caught Elvis Presley's attention.

PEOPLE is looking back at the 1956 murder case ... and the holidays,” the Grimes sisters’ younger brother James Grimes told The Chicago Tribune in 2013. “I always wonder if they were ...

PEOPLE is looking back at the 1956 murder case, which has remained cold for ... especially around Christmastime and the holidays,” the Grimes sisters’ younger brother James Grimes told The Chicago ...