Stephen Paddock
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Tragedy in Vegas
Sunday’s bloody mass shooting outside casino is the worst massacre in recent U.S. history
The mystery and motive behind mass killer Stephen Paddock — gambler, accountant, auditor and real estate investor — continues to baffle federal authorities and law enforcement officials in Las Vegas who were working on Wednesday to discover what drove the 64-year-old to commit the worst mass murder in modern U.S. history.