Police believe that a man they arrested weeks ago in connection with the killings of two Los Angeles women may be connected to as many as 30 unsolved murders in Southern California over the past three decades.

Pasadena Police say they began to explore cold cases of murdered elderly women after learning that the DNA of John Floyd Thomas, Jr., a career criminal, matched that found at the scenes in the two recent cases.

Thomas, 72, was also arrested in Pasadena, Calif., in 1978 on suspicion of rape but was convicted on lesser charges.

The question now, police say, is whether there is a pattern to the unsolved murders.

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