Sgt. Craig Hutchinson of the Travis County Sheriff's office used his police radio around 1:30 am to report people were in his backyard. Investigators arriving moments later discovered Hutchinson's body in his backyard in Round Rock, about 15 miles from Austin.
Travis County Sheriff Greg Hamilton said at a news conference that no arrests have been made but that authorities are seeking multiple suspects.
He said there had been reports of robberies in the area and that there was evidence the incident was an attempted robbery of Hutchinson's backyard shed, rather than an ambush targeting him as a law enforcement officer.
Hamilton said Hutchinson, a 36-year veteran, helped to train him when he first joined the force.
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"This is near and dear to me," Hamilton said. "This guy was a big teddy bear. Everyone loved him."
The block where the shooting occurred remained ringed with yellow tape and red tape surrounded Hutchison's home, more than six hours after the shooting. Authorities could be seen working in the area around the home.
Police later briefly closed portions of Interstate 35 heading into Austin as a long procession of police cars transported Hutchinson's body to the medical examiner's office.