U.K. Police Give Details of London Attacker, Make More Arrests

London Attacker Identified as Khalid Masood

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Birmingham, England (AP) -- Long before his short stints in jail turned into years behind bars, Khalid Masood was known as Adrian Elms, with a reputation for drinking and an unpredictable temper.

At least twice he was convicted of violent crimes, well before he stabbed a police officer to death Wednesday in London with a motion that one horrified witness described as "playing a drum on your back with two knives."