A 1975 cold case in Howard County was put to rest Tuesday after police recovered a lost recording that implicated a man who is already serving a life sentence in a Maryland prison.

The 1975 murder of a 20-year-old woman went unsolved for nearly half a century. But now, Howard County Police say they have a confession. Investigators say a man in his 70s, who is already behind bars,

The breakthrough wasn't because of new DNA technology, armchair detectives or a podcast. It was solved by old-fashioned detective work.