UPDATE: Sources tell NBC10 the person of interest is the victim's husband.
A person of interest in the murder of a Northeast Philadelphia mother of two is being questioned by police, according to investigators.
Constance "Connie" Murray, 46, was found dead Tuesday morning in Pennypack Park.
The Holme Circle mother was last seen alive when she left her Tolbut Street home to go for a jog Monday night. Her family searched for her and then contacted police when they were unable to locate her.
A woman walking her dog found Murray's body Tuesday around 6 a.m. in the park near the Crispin Rec Center.
According to police, surveillance video shows Murray traveling down Willets Road to Convent Avenue and on to Holme Avenue Monday night. Police say Murray was carrying headphones and a cellphone with her shortly before her death. Those items have not been recovered.
The Medical examiner ruled Murray's death a homicide by strangulation.
"He did not see much sign of a struggle," said Philadelphia Police Homicide Division Cpt. James Clark. "There was some minor bruising on her."
Clark also said there were no signs of a sexual assault.
Detectives interviewed "a lot of people" in the neighborhood. While a person of interest is now in custody, no charges have been filed. Police also say a driver was spotted on surveillance video stopping and talking to Murray "for a couple of seconds" in the moments before her death. They have not yet revealed whether that driver is the person who they are now questioning however.
The City of Philadelphia, Citizens Crime Commission, Fraternal Order of Police, Philadelphia Parking Authority, District Council 21 Painters and Allied Trades and Philadelphia Federal Credit Union combined to offer a $51,000 reward for information leading to an arrest and conviction -- $30,000 of the reward money is offered for just an arrest in the case. The Parking Authority got involved since Murray's brother Kevin McClane works for them.
Colleen Gass, a family friend, told NBC10 she recently spoke with Murray's sister, who wanted to relay a safety message.
"Her sister wanted me to tell everyone not to wear earbuds while running," Gass said. "The whole reason she thinks her sister was attacked was because she didn't hear him coming. She had her earbuds in."
Captain Clark shared his own warning to those who frequent the park.
"Females out there walking or jogging should always be in the company of someone else," Clark said.
Police have no motive in the murder and say at this point it's unclear whether it was a random or targeted attack.
If you have any information on Murray's death, please call Philadelphia Police at 215-686-8477 or 215-546-TIPS to ensure you are considered for the reward.