Mark Castillo and his three children spent the day downtown, at the Maryland Science Center, before he checked into the Marriott Inner Harbor hotel at Camden Yards about 5 p.m. March 29, 2008, according to a statement he gave police at Maryland Shock Trauma Center a day later.
By then, the children were dead, and Castillo was recovering from self-inflicted stab wounds to his neck.
"My plan," he said on the tape, "was after [we] had a good day, to, uh, take their lives."
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