The State Attorney's Office has determined it will not file charges in relation to the June 8 shooting death of Deanna Stevison.

The Escambia County Sheriff's Office and State Attorney's Office have been investigating the 31-year-old woman's death for more than three months to determine whether the shooter was justified in using deadly force on Stevison as she entered an apartment in the 600 block of Fairfield Drive early that morning.

In such a case, it's standard procedure for the police agency to investigate the incident, followed by a review by the state.

In the findings released Tuesday afternoon, the state determined Ollie Plunkett, 66, acted in self-defense when she shot Stevison, and the use of deadly force was justified.

More:Family seeks answers in 'stand your ground' case

According to the State Attorney's Office, ECSO responded to the apartment at 5:30 a.m. and found Stevison lying motionless outside the apartment's front door.

She sustained two gunshot wounds and died as a result of her injuries.

The report states Amy Plunkett, a former Escambia County Sheriff's Office deputy; her girlfriend, Meghan Wojdyla; and Ollie Plunkett, Amy's mother, were in the apartment at the time of the shooting.

Wojdyla had previously been in a relationship with Stevison for six years, and the two owned a house together.

Ollie Plunkett told investigators she had been asleep on the couch in the living room and was awoken to banging on the door just after 5 a.m. She said she went to wake up her daughter to see if she was expecting company. When Amy Plunkett opened the door, Stevison forced her way inside, according to the report.

Ollie Plunkett told authorities Stevison attacked Amy Plunkett and turned on Ollie Plunkett when she attempted to intervene.

Ollie Plunkett attempted to call 911, but Stevison took her cellphone and threw it, the report states.

More:Police: Woman fatally shot in domestic violence incident

Ollie Plunkett picked up a gun from the television stand and shot Stevison when Stevison began choking Amy Plunkett. Ollie Plunket said she fired several warning shots, but she feared for her life and ultimately shot Stevison multiple times.

Wojdyla told police Stevison appeared drunk when she came to the house. Police reviewed phone records between Wojdyla and Stevison and determined the relationship was "turbulent." On several occasions, Stevison sent more than 50 consecutive text messages to Wojdyla, primarily asking where she was and if she was with Amy Plunkett. Stevison also threatened suicide and texted a photo of herself with a firearm in her lap to Wojdyla, according to the report.

Three days before the shooting, Stevison sent a text message saying "every day, I think of ways to kill Amy and get away with it," the report states.

Stevison was a mother and a corrections officer at Blackwater River Correctional Facility and grew up in the Pensacola area, according to her family.

Stevison's family — in particular her mother, Sheila Wilson, and twin sister, Savanna Stevison — have maintained throughout the investigation that Deanna was targeted.

Stevison's death came within days of Florida changing its already controversial "stand your ground" law.

The change, signed into law June 9, shifts the burden of proof in such cases from the defense to the prosecution. Previously, the defense needed to prove the suspect had a right to defend himself or herself with deadly force, but now the state needs to prove the suspect did not.

In Stevison's case, the state ruled Ollie Plunkett was reasonable in her belief that she and her daughter were in danger.

"Amy Plunkett stated that she was beginning to lose consciousness from being choked at the time of the gunshots which would indicate that she was in danger of imminent death or great bodily harm," the report states.

The report concludes none of the women involved in Stevison's death will face charges.