A Castle Shannon father accused of pouring gasoline throughout his family's home before an explosion killed his 19-year-old daughter has pleaded guilty, agreeing to serve 15 to 30 years in prison rather than face trial on first-degree murder charges. Brian Shelleby, 47, admitted to third-degree murder and aggravated arson in connection with the September 14, 2025 blast that killed his daughter Lakyn Shelleby and severely burned his estranged wife, Carly Shelleby, at their home on Corbett Drive.
The plea agreement, accepted Monday, resolved a case that had originally been charged as first-degree murder, according to WTAE. Under the deal, Shelleby admitted to intentionally setting the fire, and he is now scheduled for sentencing next month. As reported by WPXI, the negotiated sentence of 15 to 30 years falls within the range prosecutors and defense attorneys settled on rather than risk a trial verdict.
How the Fire Started
Testimony from an October 2025 preliminary hearing, detailed by the Pittsburgh Post-Gazette, showed that a deputy fire marshal determined the home's gas oven likely ignited gasoline vapors after Shelleby poured five gallons of gasoline throughout the basement, garage, and first floor. Prosecutors argued Shelleby knew his wife was cooking and that his daughter was upstairs when he poured the fuel. The same reporting indicates that while defense counsel argued the fire was not directly ignited by hand, court testimony showed the vapors were likely set off by the kitchen appliance.
Investigators established that the domestic dispute began when Carly Shelleby told her estranged husband he could not stay at the home, prompting him to pour the gasoline through the structure, according to the newspaper's account. Security camera footage from a neighboring home captured the morning blast, showing Carly Shelleby running out of the house with her clothing visibly on fire. She suffered severe burns and was hospitalized at UPMC Mercy.
A Daughter Who Couldn't Make It Out
Firefighters located Lakyn Shelleby unresponsive inside the residence approximately 20 feet from the front door, after she made it down the stairs from her second-floor bedroom but was unable to escape, the Post-Gazette reported. She was pronounced dead at the scene by emergency personnel. The Allegheny County Medical Examiner's Office formally ruled her death a homicide the following month, determining the cause of death to be thermal injuries and inhalation of combustion products, per TribLIVE.
Lakyn Shelleby had just started her sophomore year at the University of Pittsburgh at the time of her death, according to WTAE. She graduated in 2024 from Keystone Oaks High School, where she played tenor saxophone in the marching band, earned a first-degree black belt in Tang Soo Do martial arts, and worked as a Sheetz associate while attending college, per her obituary at Laughlin Funeral Home. Neighbors knew her well and described her as loving and strong-willed, according to WTAE, calling the Castle Shannon street a very tight-knit community.
Community Grief and Support
Local residents and classmates gathered for a prayer vigil the day after the fire at Saint Anne's Church in Castle Shannon, located one block from the Shelleby family home, which served as a gathering point for mourning neighbors. An online GoFundMe campaign created to help Carly Shelleby with medical and living expenses raised over $39,000 in the days immediately following the disaster, as she underwent extended hospital recovery for her burn injuries.
Why the Plea Deal Came Together
Defense attorneys Wendy Williams and Phil DiLucente said Shelleby accepted the plea agreement to take full responsibility and spare both sides of the family the trauma of a trial. The attorneys noted that both families remain in communication despite the tragedy, according to WPXI's report.
Under Pennsylvania Criminal Code 18 Pa.C.S. § 2502, third-degree murder is classified as a felony of the first degree involving malice without specific intent to kill, carrying a maximum statutory sentence of up to 40 years in prison, per the Pennsylvania General Assembly. Shelleby's negotiated 15-to-30-year term falls within that statutory ceiling, resolving the pending first-degree murder charges he originally faced. Formal sentencing remains set for September 10 before an Allegheny County judge.
