A high school journalism teacher has shot dead her former police officer ex-husband after an argument during a messy split , police have said . Cara Ryan , 45 , killed John Joseph Rush , also 45 , at her home in Indian Rocks Beach , Florida around 11pm on Saturday . The Pinellas County Sheriff 's Office initially said the shooting occurred during a domestic dispute and they did not bring any charges , but on Friday , they said that Ryan had been arrested . The sheriff said he would share more details about the incident at a press conference on Friday afternoon . Gunned down : Cara Ryan , left , shot dead her ex-husband John Joseph Rush , right , on Saturday after an argument at their home . She has now been charged with his murder following an investigation . Authorities previously said they had been arguing before the shooting , Fox 13 reported . The couple , who have a grown daughter together , had divorced in 2003 but then they later moved back in with each other , Fox reported . But Rush 's family told the channel that the relationship had soured again in recent months and he had moved out of the home in February . It was not clear why he returned at the weekend . Rush , known to friends as 'JJ ' , had retired from the St Petersburg Police , where he had worked in the forensic unit , with an injury following an on-duty car crash in 2005 . Afterwards he went to work for the county medical examiner 's officer , family members said . Sergeant Joe Pratt , who had worked with Rush , said he was stunned that his friend , who had survived working a dangerous job , was ultimately killed at home , WTSP reported . 'Something like this , you just never anticipate , so it 's really a shock when something like this happens to someone you know and care about and has been a part of your life the past 25 years , ' he said . Split : Ryan , a high school teacher , and Rush , a former cop , had divorced in 2003 but had rekindled and had moved back in together . But their relationship soured again and he moved out last month . Scene : The shooting unfolded following an argument at Ryan 's home , pictured , on Saturday night . Shock : Police can be seen responding to the scene in Indian Rocks Beach on Saturday night . Ryan , who owns the home where he was shot , is a media production teacher at Clearwater High School . According to her LinkedIn page , she has been with the school district for two decades . Her Facebook profile features a picture of her and her ex-husband sitting close together and looking into each other 's eyes . Another image shows them walking on a beach with their daughter . On a gofundme page set up in her father 's memory , their daughter Meghan paid tribute to his service . The page has raised more than $ 5,000 of a $ 10,000 goal . 'The unexpected death of John has been an emotional roller coaster for our family , ' she wrote . 'We are all proud of John ’ s service and we always greatly appreciate the day to day sacrifices that our men and women in uniform make just like John has . ' See below for video .
Cara Ryan 'shot dead her ex-husband John Rush , 45 , during an argument at her Florida home on Saturday evening ' The couple divorced in Friday but later rekindled and moved back in together - but the relationship had soured again and he moved out last month . Authorities initially said the shooting occurred during a domestic dispute and did not bring any charges , but Ryan 's arrest was announced on 2003 . Rush had worked at the St Petersburg Police Department until 2005 .