Crime Pa. Man Accused of Setting Ex's House on Fire 1 Day After Breakup, Killing Her Sister Who Used Wheelchair Even after being arrested, Aaron Clark allegedly sent threatening messages to his ex from an Apple Watch he'd hidden on his person By Laura Barcella Published on December 8, 2022 12:38 PM Share Tweet Pin Email Photo: Facebook On Sunday, Dec. 4, a day after his girlfriend broke up with him, a Philadelphia man allegedly drove to his ex's home and set it on fire. The woman was not home at the time, but her younger sister, who had cerebral palsy and relied on a wheelchair, could not escape the blaze and was killed, according to an affidavit of probable cause obtained by PEOPLE. Aaron Clark, 30, was arrested hours later. He has since been charged with multiple counts of murder, arson, stalking and more in the Darby Township fire that killed 20-year-old Olivia Drasher. Two relatives, as well as Drasher's nurse, were also inside the house, but managed to escape. "He knew the sister was in the house and would be unable to get out of the flames … This is the most evil act committed by an absolute monster that I have ever had to investigate," Darby Township Police Chief Mike Sousa alleged during a recent press conference. "This is all about intimate partner violence … taken to the highest degree possible," Jack Stollsteimer, Delaware County District Attorney, also said at the conference. "He tried to kill four people because one of their family members didn't want to be romantically involved anymore." Clark and his ex-girlfriend, Amira Rogers, worked together at the USPS, and Rogers filed a complaint against him with the Postal Inspection Service just one day before the fire. She said he'd tried to choke her that morning when she told Clark she was ending their relationship, the probable cause affidavit says. Before Sunday's deadly fire, Clark allegedly sent multiple menacing texts to Rogers, per the affidavit. He also threatened to post explicit photos of her on social media, allegedly texting, "Pick up before I do something crazy, hope you don't miss the show." DARBY TOWNSHIP POLICE DEPARTMENT The fire at Rogers' home broke out a little after midnight on Sunday, and Clark was allegedly seen on surveillance footage walking away from his ex's house soon after. A neighbor told police they saw Clark allegedly throw an object, with an "orange glow," at the house. Three people escaped, but they could not get Drasher out. By the time firefighters arrived, the flames and smoke were too intense to broach, the affidavit states. An autopsy determined Drasher had died from smoke and soot inhalation, as well as thermal body burns. "[Drasher] was in this house, unable to move, unable to communicate, as her body is being fried and as she's choking to death because of the smoke, all because Mr. Clark was angry about her older sister breaking up with him," Stollsteimer later said, according to NBC Philadelphia. Even after Clark's arrest, Stollsteimer alleged, the suspect continued to send threatening texts to his ex. While in the holding cell, Stollsteimer said, Clark texted Rogers from an Apple Watch he'd hidden inside his rectum, "…just so he could further bring it home to this woman, what he did to her." Clark was allegedly "combative" and tried to spit on officers when they took the watch away. Want to keep up with the latest crime coverage? Sign up for PEOPLE's free True Crime newsletter for breaking crime news, ongoing trial coverage and details of intriguing unsolved cases. In an interview with CBS, Drasher's great aunt said she had concerns about Clark when she met him. She told the station that his smile looked "sinister" and that something "didn't seem right" about him. Amira Rogers has launched a GoFundMe to raise money for her now-homeless family. "My mother was able to save Raquelle Drasher, Olivia's twin sister. But my baby sister Olivia did not make it out. My family has lost everything," she writes. Clark remains in custody and was reportedly denied bail. It's unclear whether he has retained an attorney. If you are experiencing domestic violence, call the National Domestic Violence Hotline at 1-800-799-7233, or go to thehotline.org. All calls are toll-free and confidential. The hotline is available 24/7 in more than 170 languages.