Barbara Lenz went missing in 1989, and her boyfriend, Robert Davis, has been charged with first-degree murder thanks to a new cold case unit.

The Iowa Attorney General's Office new unit reopened the case and brought fresh eyes and focus to Lenz's disappearance.

Davis had a history of violence against Lenz, and witnesses reported threatening comments he made.

Following Lenz's vanishing, Davis was convicted of kidnapping and sexual abuse in 1996.

Despite a lead in 2006 that brought hope, Lenz's skeletal remains were not found.

Now, after nearly 30 years, there is hope for closure in Lenz's case.

An 82-year-old man has been arrested in connection with the 1979 cold case murder of Kathryn Donohue in Maryland.

Through the use of genetic genealogy, investigators were able to identify the suspect as Rodger Zodas Brown, who lived in Prince George's County at the time of the murder.

Brown was arrested at his home in North Carolina and charged with first-degree murder, rape, and related charges.

There is no apparent connection between Donohue and Brown.

Donohue's family expressed gratitude for the closure provided by the arrest, and the police chief emphasized the importance of pursuing justice regardless of time passed.

The investigation remains active.

In August 1995, a 15-year-old girl disappears while riding her bike near Indiana Dunes National Park, prompting a massive search effort. But much like the shifting terrain under law enforcement’s feet, a hidden predator blends into a growing wave of violence that sweeps through northern Indiana and northeast Illinois that summer.