Texas Cold Case Reopened: $5,000 Reward Offered in 1984 Homicide of Lancaster County Woman

JACK COUNTY, TEXAS — Authorities have reopened a decades-old homicide case after confirming the identity of Roberta “Berta” Mumma, a woman from Lancaster County, Pennsylvania, whose skeletal remains were found in Jack County, Texas, in 1984.

Remains Identified After 40 Years

Mumma was just 25 years old when she was killed near the community of Wizard Wells. For years, her remains went unidentified, but in 2024, DNA analysis and advanced forensic testing confirmed her identity, bringing long-awaited answers to her family.

The discovery has now prompted a renewed push by law enforcement, with officials offering a $5,000 reward for information leading to an arrest or resolution in the case.

Last Known Whereabouts

According to the Jack County Sheriff’s Office and the Texas Rangers, Mumma’s last known location before her disappearance was in Tennessee. Investigators are asking anyone who may have seen her in Tennessee or Texas to come forward with details that could help piece together her final days.

Authorities believe that even small pieces of information could prove vital in identifying her killer and bringing closure after four decades.

Investigation Expands Across States

The case has now drawn assistance from the Pennsylvania State Police Troop J – Lancaster Station, underscoring the multi-state nature of the investigation. Detectives are working to retrace Mumma’s movements and connections, hoping to uncover leads that were missed in the original investigation.

How to Submit Tips

Law enforcement officials have urged the public to share information by contacting:

• Texas Ranger Michael Schraub at 940-549-0549
• Jack County Sheriff’s Office at 940-567-2161
• Or submitting tips online through PSP Tips or by calling 1-800-472-8477

All callers remain eligible for the $5,000 reward if their information directly contributes to solving the case.

Seeking Justice After Decades

While the passage of time presents challenges, investigators remain committed to finding those responsible for Mumma’s death. “This is about bringing justice and peace to the family after 40 years of uncertainty,” officials stressed.

For ongoing updates on unsolved cases, public safety alerts, and crime investigations across the U.S., stay connected with ChicagoSuburbanFamily.com.