Joseph appeared to have been cleaned and freshly groomed, with a recent haircut and trimmed fingernails, although he had suffered extensive physical attacks prior to his death, with multiple bruises on his body.On February 25, 1957,[8] Zarelli's body, wrapped in a plaid blanket, was found in the woods off Susquehanna Road in the Fox Chase neighborhood of Philadelphia.[13][14] The police also distributed a post-mortem photograph of the boy fully dressed and in a seated position, as he may have looked in life, in the hope it might lead to a clue.[15] On March 21, 2016, the National Center for Missing & Exploited Children released a forensic facial reconstruction of the victim and added him into their database.In 1960, Remington Bristow, an employee of the medical examiner's office who doggedly pursued the case until his death in 1993, contacted a New Jersey psychic, who told him to look for a house that matched the foster home.[9][12] In 1998, Philadelphia police lieutenant Tom Augustine, who was in charge of the investigation, and several members of the Vidocq Society (a group of retired policemen and profilers), interviewed the foster father and the stepdaughter (whom he had married).[22][better source needed] Another theory was brought forward in February 2002 by a woman identified only as Martha, or "M", accusing her mother of acquiring and killing the child.[24] In 2016, two writers, one from Los Angeles, California (Jim Hoffmann) and the other from New Jersey (Louis Romano), believed they had discovered a potential identity from Memphis, Tennessee, and requested that DNA be compared between the family members and the child.Local authorities confirmed that they would investigate the lead, but said they would need to do more research on the circumstances surrounding the link to Memphis before comparing DNA.[25] At a December 2022 press conference, Philadelphia Police Commissioner Outlaw stated that Joseph's death is "still an active homicide investigation and we still need the public's help."[29] In January 2023, The Philadelphia Inquirer reported that Joseph's biological parents were Augustus John Zarelli, known as "Gus," and Mary Elizabeth (née Abel) Plunkett, known as "Betsy.
Posters showing Zarelli's postmortem photos that was distributed during the initial investigation
Zarelli's legs showing signs of severe
bruising
, malnutrition and scarring
Forensic
facial reconstruction by
Carl Koppelman
showing what Zarelli may have looked like when he was alive
Memorial sign near the location where the body was found on the side of Susquehanna Road. The sign was erected five years before Zarelli's identification.