Dallas police believe they may have caught serial killer after man charged with murdering woman, 81

A Dallas man has been charged with murdering an 81-year-old woman by smothering her with a pillow before stealing her jewellery - and cops fear the killer could have multiple victims.

Police already had Billy Chemirmir, 45, under surveillance for attempting to kill a woman using a similar method when they saw him dumping a jewellery box bearing the name of Lu 'Kim' Harris, who they tracked down to a home where she was found dead.

Sources told local media officers suspect Chemirmir had multiple victims, all of them elderly, who he duped into letting him into their homes by posing as a health worker or maintenance man.

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