A Dallas police officer is facing manslaughter charges.

According to the Washington Post, the unidentified officer fatally shot 26-year-old Botham Shem Jean. The officer claims she mistakenly entered his Dallas apartment late Thursday believing it was her own. According to a Dallas PD news release, the shooting occurred at around 10 p.m. local time. Jean was pronounced dead shortly after.

“At some point she fired her weapon striking the victim,” the police department’s news release read. “[The off-duty officer] called 911—officers responded in about four minutes. Dallas Fire Rescue also responded and took Mr. Jean to the hospital where he later died.”

Dallas Police Chief Ulysha Renee Hall could not say whether or not the officer was in custody; but she did confirm that the woman was placed on administrative leave and could be charged with manslaughter.

“Right now, there are more questions than we have answers,” Hall told reporters Friday. “[…] as we continued the investigation it became clear that we were dealing with what appears to be a very unique situation.”

Jean’s uncle, Earl Jean, posted a tribute to his nephew Friday morning.

People took to Twitter to express their disbelief at the situation. 

Stay tuned as more information about the case becomes available.