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Citing an unidentified law enforcement official with direct knowledge of the case, The Dallas Morning News reported that Guyger had just ended a 15-hour shift when she returned in uniform to the South Side Flats apartment complex where both she and Jean lived. She parked on the fourth floor, instead of the third, where she lived, possibly suggesting that she was confused or disoriented.
When she put her key in the unlocked apartment door, it opened. Inside, the lights were off. Then she saw a figure in the darkness, according to the official, who was not authorized to discuss the case publicly.
The officer concluded that her apartment was being burglarized, drew her weapon and fired twice. When she turned on the lights, she realized she was in the wrong unit, the newspaper reported.
A spokeswoman for the Texas Rangers did not immediately return a call from The Associated Press seeking to confirm the details of newspaper report.
Mayor Mike Rawlings also said Monday that Guyger had parked on the wrong floor.
The Dallas County medical examiner's office said Jean died of a gunshot wound to the chest. His death was ruled a homicide."
Case against officer who killed neighbor to go to grand jury