Stephen Paddock

Stephen Paddock

Stories this photo appears in:

Tease photo

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.