Mary Caperton, 39, was murdered on April 21, 1980, in Dallas County, Texas. Her killing was linked to a series of violent crimes committed in the area between 1978 and 1980 by Danny Lee Barber.

Barber’s known pattern included breaking into homes and attacking victims with blunt objects, and his crimes are described as involving beating, stabbing and sexual assault. He confessed to Caperton’s murder and admissions to other killings are reported to have led to convictions; Barber was convicted of three murders.

Did anyone who knew Mary Caperton or her routine in 1980 notice anything unusual around April 21 that might add details to the timeline of her last hours?