Washington D.C. Metropolitan Police Department

A weeklong manhunt for the killer of a wealthy Washington, D.C., family and their housekeeper has ended with the arrest of a welder who once worked for the family’s patriarch. The arrest doesn’t answer all the unanswered questions, but here’s a timeline of what’s known so far.

May 13

Savvas Savopoulos, the 46-year-old CEO of American Iron Works, is cleaning a martial-arts study he owns in Northern Virginia. Nelitza Gutierrez, a housekeeper for Savopoulos and his family, is there helping.

Savopoulos gets a 5:30 p.m. call from his wife, Amy, 47, telling him to come home to watch their 10-year-old…

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