A judge has ruled that Jurors will be allowed to consider the so-called castle doctrine in the murder case against former Dallas police officer Amber Guyger.

Guyger claims that she mistakenly entered the wrong apartment and killed Botham Jean.

Per the Castle doctrine, your home is your castle, and you have the right to use lethal force to defend your home and not retreat. The interpretations as to what the guidelines are can differ state to state.

"The law recognizes that mistakes can be made. It's always tragic. The law's not perfect. It's tragic, but you have to follow this law," Attorney Toby Shook said during closing statements on Monday, adding that prosecutors "must prove beyond a reasonable doubt the defendant wasn't acting in self-defense ... And if they can't do that, it's not guilty."

"Who would not have sympathy for Botham Jean? Wonderful human being -- died in these horrible, tragic circumstances," Shook said according to CNN. "Who would not have sympathy for his family or anyone in that position? "

Defense attorney Robert Rogers told the jury that Guyger was exhausted from working 40 hours in four days. Rogers told the jury that Guyger was aware that residents of her apartment complex had experienced recent break-ins and car burglaries.

"Amber was very aware, based on her job, that where she lived was, unfortunately, a high-crime area," Rogers said. He also shared that Guyger was on "auto-pilot" after a long shift and didn't see the red mat at Jean's door when she inserted the key 

Guyger entered the apartment and saw the figure of a large individual inside coming toward her, yelling, "Hey! Hey!' ignoring her orders to show him her hands. She reportedly feared for her life.