Crime Fla. Man Allegedly Murdered Former In-Laws with Hammer Because They Suspected He Killed His Ex-Wife Shelby John Nealy allegedly stayed in the slain family's home with their bodies inside, even ordering a pizza By Chris Harris Chris Harris Twitter Chris Harris has been a senior true crime reporter for PEOPLE since late 2015. An award-winning journalist who has worked for Rolling Stone and MTV News, Chris enjoys prog rock, cycling, Marvel movies, IPAs, and roller coasters. People Editorial Guidelines Published on February 5, 2019 11:40 AM Share Tweet Pin Email Photo: National Center For Missing and Endangered A Florida man police believe killed his ex-wife and then pretended to be her in text messages to her parents allegedly murdered his former in-laws and their adult son when they expressed suspicion. In newly released charging documents obtained by PEOPLE, detectives allege that soon after his arrest last month, Shelby John Nealy, 25, confessed to all four killings — as well as pretending to be his ex-wife, 21-year-old Jamie Ivancic, in an attempt to hide her death. Nealy has been in custody on three counts of first-degree murder since he was apprehended in Lakewood, Ohio, on Jan. 4. He has not yet been changed in his ex-wife’s death. The documents state that authorities tracked Nealy using the GPS from his ex’s car, which he’s accused of stealing and using to flee to Ohio. He has also been charged with one count of grand theft auto. Police performing a welfare check found the bodies of Laura Ivancic, 59, and Richard Ivancic, 71, inside their mobile home in Tarpon Springs on Jan. 1. Nealy also allegedly killed Jamie’s brother, Nicholas Ivancic. All three bodies were in an advanced state of decomposition and a hammer was used to carry out the murders. Officers entering the “ransacked” mobile home were met by an overwhelming odor, according to the documents. The documents state that Jamie was killed in January 2018, but they do not specify a motive. Once her parents began questioning why they couldn’t talk to her over the phone, Nealy — who had allegedly been using Jamie’s phone to send text messages and pictures of their two small children — drove to his in-laws’ home to commit the killings, the documents allege. According to police, Nealy stayed at the home for days after the killings, and even had a pizza delivered six days later. It is further alleged Nealy killed his in-law’s three dogs. He’s also facing three counts of aggravated cruelty to animals. • Want to keep up with the latest crime coverage? Click here to get breaking crime news, ongoing trial coverage and details of intriguing unsolved cases in the True Crime Newsletter. Nealy is being held without bond after being extradited to Florida over the weekend. It was not immediately clear if Nealy has retained an attorney or entered pleas to the charges against him. Jamie’s body has been recovered from a home in a nearby county, and the documents allege they only found her remains with Nealy’s cooperation. The couple’s two children are safe and in state custody, authorities said.