Investigators say the case against Jacob Rabb grew from technical findings and later statements gathered after the fire.
PLUM, Pa. — The criminal case over a 2022 house explosion in Plum is built less on a single dramatic discovery than on a chain of records, witness accounts and handwritten notes that police say point to one conclusion: the blast was intentional.
Jacob Rabb, 41, was charged in March after investigators said he manipulated a gas connection at the family’s Hialeah Drive home while his partner and three children were inside. The prosecution matters because it turns a fire scene that once looked unresolved into a case centered on technical utility data, a deputy fire marshal’s conclusion, alleged admissions and later domestic-conflict evidence. Together, those pieces are what police say transformed suspicion into attempted homicide and arson charges.
Investigators said Peoples Gas records showed “extremely high gas consumption” at the residence on three separate days during the month of the explosion. Police alleged that pattern matched three occasions when Rabb manually disconnected the gas supply to the dryer, including April 22, 2022, the night the house blew apart. According to the complaint, a nearby furnace likely provided the ignition source after natural gas vapors spread through the home. A deputy fire marshal concluded the fire was caused by natural gas intentionally released through manual manipulation of the line. In a case where the structure itself was largely destroyed, that records-and-forensics trail became one of the most important parts of the charging decision.
The human toll was immediate. Rabb, Laura Petty and their three sons were inside the home shortly before 11:30 p.m. when it exploded. The two younger boys, then 6 and 2, escaped with the adults. Their oldest brother, 11 at the time, had been in the basement playing video games and got out through a window after suffering first-degree burns. The house was destroyed, nearby homes were damaged and the family’s lives split into a before and after. What was not clear right away was whether the blast came from an accident inside the home, a utility problem outside it or a deliberate act. That uncertainty shadowed the neighborhood for years.
Police said later witness evidence gave the technical findings narrative weight. Rabb’s father told investigators that his son admitted causing the explosion, according to published reports on the complaint. Petty also told police she found two notes in a kitchen cabinet after the couple separated and after she sought a Protection from Abuse order in May 2023. One note said in part, “If I can’t have her no one will or my kids…” Another said, “P.S. I did blow up the house.” Investigators also said Rabb violated the protection order and threatened Petty with a knife weeks later. In the state’s theory, those later details supplied motive and consciousness of guilt to pair with the gas and fire evidence.
The legal case is broad. Court reporting on the filing said Rabb faces four counts each of attempted criminal homicide, aggravated arson and arson endangering persons, along with additional arson-related charges. He was held without bail after arraignment. The exact path from those charges to trial will depend on how a judge evaluates the evidence at the preliminary stage and whether prosecutors later file the case in a higher court. Defense challenges could focus on how investigators reconstructed the gas releases, whether the notes can be authenticated and how any alleged admissions were reported and preserved.
There is also the problem of time. The explosion happened in April 2022, but charges were not filed until March 2026. Emergency officials had previously said the investigation was prolonged by the need for forensic testing of gas lines and appliances and by follow-up interviews. That long timeline may become part of the courtroom fight as well, because prosecutors will argue it reflects painstaking reconstruction, while defense lawyers may argue it shows how difficult it was to pin down a cause in a destroyed house. Either way, the case shows how arson prosecutions can emerge years after the flames are gone.
As of the March filing, Rabb remained jailed and a preliminary hearing had been set for March 18. The next decisive milestone will come when the court determines whether the evidence chain is strong enough to move the case deeper into the criminal system.
Author note: Last updated April 6, 2026.