Police say the officer, who has not yet been publicly identified, arrived at the downtown apartment complex after working her normal police shift and was still in full uniform upon entering the victim's apartment, which she thought was her own.
Citing a relative of Jean, the St. Lucia Times reported that the officer lived in an apartment on another floor of the same apartment complex.
It was not clear what the officer may have said to 26-year-old Botham Jean after entering his home late Thursday.
The officer was not injured during the incident.
Dallas Police Chief Rene Hall said in the interest of being as transparent as possible, she has invited the Texas Rangers to take over the investigation. Police said he was rushed to a nearby hospital, where he was pronounced dead.
A private Christian university in Arkansas says the 26-year-old man who was killed by an off-duty Dallas police officer who said she confused his apartment with her own was a native of the Caribbean island country of St. Lucia who often led worship services at the school's campus.
"We heard cops yelling, but otherwise had no idea what was going on", Hernandez said.
Trump knocks Kerry over possible 2020 run
He's said that Kerry should have "walked away" when Tehran wouldn't abide by the terms presented by the U.S. Given the tenor of the activists, however, even that may prove impossible for Kerry to pull off.
Police also know that she was at the wrong apartment.
Hall said the officer's blood was drawn to be tested for drugs and alcohol.
The Dallas Police Department is conducting a joint investigation with the District Attorney's Office for this case.
The officer will be placed on administrative leave during the investigation.
"Initial indications were that we were dealing with an officer-involved shooting".
"Just last week I was thinking of what to get you for your birthday, now I have to go pick out your casket". They told The Dallas Morning News that they can open apartments with either standard keys or a keypad code. She said he graduated from Harding University in 2016, and then remained in the United States after landing an internship in Dallas.