Jeffrey “Jeff” Costello, 58, died in a tragic domestic murder-suicide in Port Richmond, Philadelphia, Pennsylvania, on August 15, 2026. His 21-year-old daughter, Riley Costello, was also found deceased inside their home on Mercer Street.
Philadelphia police discovered the father and daughter during a welfare check after concerned people reported that they had not heard from the residents. Investigators said both had suffered gunshot wounds and were pronounced dead at the scene.
Jeff Costello of Philadelphia died on August 15, 2026, at age 58, in what police are investigating as a domestic murder-suicide. His 21-year-old daughter, Riley Costello, was also found dead inside their Port Richmond home. Police believe the shooting may have occurred several days before the bodies were discovered. The investigation into the circumstances and possible motive remains ongoing.
What Happened to Jeff Costello?
Philadelphia police were called to a home in the 2800 block of Mercer Street in Port Richmond at approximately 1:30 p.m. Saturday after concerns were raised because residents had not been heard from.
Uniformed officers entered the property and found a 58-year-old man and a 21-year-old woman suffering from gunshot wounds.
Both victims were pronounced dead at the scene at approximately 2 p.m.
Police identified the incident as a suspected domestic murder-suicide.
According to investigators, the evidence at the scene indicates that the shooting may have happened several days before the bodies were discovered.
Jeff Costello and Riley Costello
The victims were identified in the information provided as Jeffrey Costello and his 21-year-old daughter, Riley Costello.
Investigators believe the father shot his daughter before turning the firearm on himself. Authorities have not yet publicly established what motivated the incident.
Inspector D.F. Pace said investigators were still working to determine what may have led to the deadly shooting.
The circumstances surrounding the deaths remain under investigation.
Port Richmond Community Shocked
The discovery shocked neighbors in the Port Richmond neighborhood.
Residents described the area as a quiet, family-oriented part of Philadelphia, making the violent deaths particularly disturbing for people living nearby.
The incident also highlighted the importance of welfare checks when family members, friends or neighbors become concerned after losing contact with someone.
Investigation Into the Deaths
Philadelphia police are investigating the incident as a domestic murder-suicide.
Investigators are working to establish the timeline of events, including when the shooting occurred and what circumstances preceded the deaths.
Police believe the shooting took place several days before officers discovered the bodies.
The potential motive has not been released.
No additional details about the investigation should be considered confirmed until authorities make further announcements.
Jeff Costello Obituary and Family
The death of Jeff Costello represents a devastating loss for his family, friends and those who knew him in the Port Richmond community.
His daughter, Riley, also died in the incident, making the tragedy especially painful for the family members and loved ones left behind.
Information about Jeff Costello’s professional background, personal life, surviving relatives and other biographical details has not been provided at this time.
Funeral and Memorial Arrangements
Funeral, visitation and memorial-service information for Jeff Costello and Riley Costello has not been released in the information available for this article.
Details may be announced by family members or a funeral home once arrangements are finalized.
Remembering Jeff Costello
Jeff Costello’s death in Philadelphia has left a Port Richmond family and community confronting an especially tragic loss.
Authorities continue to investigate what happened inside the Mercer Street home and what may have led to the deaths of Jeff and his daughter Riley.
As the investigation continues, family members and friends are likely to remember the two victims privately while authorities work to establish the complete circumstances surrounding the tragedy.
Frequently Asked Questions
Who was Jeff Costello?
Jeffrey “Jeff” Costello was a 58-year-old Philadelphia man who lived in the Port Richmond neighborhood.
How did Jeff Costello die?
According to Philadelphia police information provided for this report, Jeff Costello died from a gunshot wound in an incident being investigated as a domestic murder-suicide.
How old was Jeff Costello?
Jeff Costello was 58 years old when he died.
Who else died in the Port Richmond shooting?
His 21-year-old daughter, Riley Costello, was also found dead inside the home.
When did Jeff Costello die?
Jeff Costello died on Saturday, August 15, 2026, although investigators believe the shooting may have occurred several days before the bodies were discovered.
What was the motive?
Police have not released a confirmed motive. Inspector D.F. Pace said the circumstances that may have motivated the shooting remain under investigation.