Dallas' police chief says a warrant for manslaughter hasn't been issued for an officer who killed a man in his home because the Texas Rangers asked her department to wait.

Chief U. Renee Hall said Saturday during a panel discussion livestreamed on Facebook by television station WFAA that the state investigators said they needed more time to investigate the Thursday night fatal shooting of 26-year-old Botham Jean.

Police say the officer shot and killed Jean at his home and later said she had mistaken his apartment for her own.

Hall said at a news conference Friday that the officer would be charged with manslaughter, but it's unclear if that will still be the case.

"The ball is in their court," Hall said Saturday. She acknowledged that many questions remain about the shooting and asked the public to give investigators enough time to get to the answers.

Allison Jean, Botham Jean's mother, wondered whether race was a factor when the officer shot and killed her son, a black man.

"I didn't know she was white until now. If it was a white man would it have been different? Would she have reacted differently?" Jean said Friday in footage broadcast by Dallas' NBC affiliate, KXAS .

Authorities have said the officer is white but haven't released her name or other details about her.

The Department of Public Safety, which oversees the Texas Rangers, didn't immediately reply to a Saturday phone message seeking comment.

Hall said Friday that the officer's blood was drawn to be tested for drugs and alcohol and she acknowledged that there were still many questions about the events that led to Jean's death.

Allison Jean, who has held government posts in St. Lucia, where she lives and where her son grew up, said her son's death "just feels like a nightmare."

The island country's government issued a statement Friday expressing "shock" at the killing and extending condolences to the Jean family. It said officials at its embassy in the U.S. would provide assistance to the family.

Botham Jean attended Harding University in Arkansas and, after graduating in 2016, he had been living and working in Dallas at accounting and consulting firm PwC. The private school said Friday that he often led campus worship services while he was a student.

-- The Associated Press