More information has been released in the shooting death of a former St. Petersburg police sergeant.

John Joseph Rush, 45, was shot and killed Saturday night at the home of his ex-wife, Cara Ryan, on First Street in Indian Rocks Beach.



On Friday, officials announced they were arresting Ryan, 45, on second-degree murder charges in his death. She had previously been identified as the shooter but charges were not filed against her until Friday.



Officials said Ryan offered several versions of the events of that night during the investigation.

Detectives said Ryan initially told them she invited Rush over to her home via text message, and that while he was in her home she received a text from another man which upset Rush. Ryan said Rush then sexually assaulted her, and she shot him out of self-defense, deputies said.



As the investigation progressed, however, deputies said Ryan made conflicting statements, and investigators said they determined her statements did not coincide with the physical evidence.



"In all these different versions of events and all these stories and concocted nonsense that she's come up with in the last few days, is just that, and she killed him," Sheriff Bob Gualtieri said during a press conference on Friday.



Gualtieri said the shooting appeared to be about control, that Ryan liked having control over Rush.

"Cara Ryan was acting out because she was losing control over him," he said. "She knew she was losing control over him, and he was asserting his independence."



Rush and Ryan divorced in 2006, but Gualtieri said they had gotten back together and then separated again in February. Ryan was mad that Rush took her name off his bank account, Gualtieri said.

After he was shot, Rush stumbled over to the neighbor's house, where the neighbor called 911. Rush died at the scene.



Friends told deputies that before he died, Rush was relieved to finally have his freedom.

"He felt ecstatic, relieved from the pressure, because he was actually able to go out and live his life," Gualtieri said.



Rush had retired from the St. Petersburg Police Department in 2005. He worked for the Pasco-Pinelllas Medical Examiner's Office after leaving the police department.

Ryan is a media and social studies teacher at Clearwater High School, according to the school's website. School officials released a statement saying Ryan had taken personal leave from the district, and that her class will be taught by a substituted in her absence.



Ryan was taken to the Pinellas County Jail without further incident. Her first appearance is scheduled for Saturday morning.