Aaron York Dean, 34, of Arlington, resigned from the Fort Worth Police Department on Monday morning. Early Saturday morning, he shot and killed Jefferson, 28, inside her home while responding to a call from a neighbor about doors at the house being open, police said.
Dean was arrested at about 6 p.m., police said at a news conference Monday night. He was booked in the Tarrant County Jail and released on bail later Monday night, according to records. Police said the investigation is continuing and another press conference will be held at 10 a.m. Tuesday.
Jefferson's family's attorney, S. Lee Merritt, wrote on Twitter that "the family of Atatiana Jefferson is relieved that Aaron Dean has been arrested & charged with murder. We need to see this through to a vigorous prosecution & appropriate sentencing. The City of Fort Worth has much work to do to reform a brutal culture of policing."