A Dallas County jury heard evidence Monday against a Dallas police officer who shot and killed a 26-year-old accountant in his own home while he was watching a football game, according to a law enforcement official with knowledge of the case.

Amber Guyger, 30, was arrested on a manslaughter charge Sept. 9, three days after killing Botham Jean. She told authorities that she mistook his apartment for hers on the night of Sept. 6 and thought he was a burglar.

After hearing the argument from the Dallas County District Attorney's Office, the grand jury could do one of three things. They could either choose to indict Guyger on the manslaughter charge, indict her on a more serious charge or choose to not indict her on any charge (no bill).

"We want them to get this process right," said Jean family attorney Daryl Washington. "The eyes and the ears of the world are on Dallas, Texas right now and we know if a young man can be lawfully in his apartment complex, not committing a penal offense, and this officer is not indicted on murder, that's going to be really problematic for the whole process."

The Jean family attorneys said the family flew in from St. Lucia and New York to be at the courthouse to testify before the grand jury, if needed.

"They have been in excruciating pain for the last 3-months anticipating this presentation to the grand jury and criminal accountability for the murder of their son," explained Jean attorney Lee Merritt.

If Guyger was no billed Monday, that information was expected to be released that afternoon.

If she's indicted on a charge, that will likely be released Wednesday when the entire docket is released publicly.

Grand jury hearings are held in secret and there are no cameras or recording devices allowed inside.

Jean's family has filed a lawsuit against Guyger and the city of Dallas in the shooting.

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