Kenneth C. Fenske, 57, was charged with child rape last Friday after allegedly attacking a young boy at fetish parties in Philadelphia. He is the latest arrested in connection to a pedophile ring

Investigators have received a significant number of tips of possible child sex perpetrators after a boy was allegedly forced to dress up in costume before being raped by several men at fetish-themed parties.

Authorities in Pennsylvania publicly revealed last week that five men have so far been charged in the investigation that saw the boy, now aged 15, being attacked repeatedly over several years.

Pennsylvania's Attorney General Josh Shapiro said a tip line set up for the case has received multiple calls in recent days.

'We have reason to believe that there may be other perpetrators, there may be other victims, which is why we spoke out publicly about this the other day,' Shapiro said.

'We've seen a significant spike in the number of tips that this office received and we are evaluating those tips.'

Court records indicate the boy was forced to dress as 'Tony the Tiger' at fetish parties in the Philadelphia suburbs where some of the attacks occurred.

Three men are accused of child rape. A fourth is accused of trying to have sex with minors through online contact. Details about the fifth arrest, a Virginia man, were not immediately available.

Authorities said the case began with the arrest of Jeffrey A. Harvey, 40, of West Wyoming, Pennsylvania, last summer on charges he tried to have sex with someone online that he thought was a 13-year-old boy. The online person was an investigator with Shapiro's office.

David R. Parker, 38, (left) and Craig Michael Knox, 35, (right) have also been charged with raping the young boy on separate occasions

Authorities said the case began with the arrest of Jeffrey A. Harvey, 40, last summer on charges he tried to have sex with someone online that he thought was a 13-year-old boy

Harvey gave detectives cellphone texts he exchanged with David R. Parker, 38, of Saylorsburg, in which Harvey expressed his desire to have sex with Parker and the boy victim, police said. Parker was arrested the next day.

FIVE CHARGED IN 'FURRY' PEDO RING: Kenneth C. Fenske, 57, of Quakertown. He was charged with multiple counts of child rape, involuntary deviate sexual intercourse, and unlawful contact with a minor David Parker, 38, of Stroudsburg, Monroe County. He was charged with child rape and related counts, including possession of child pornography. Jeffrey Harvey, 40, of West Wyoming, Luzerne County. He was charged with unlawful contact with a minor, criminal use of a cell phone, involuntary deviate sexual intercourse and statutory sexual assault. Craig Knox, 35, of Henrico, Virginia. He was charged with sexual offenses in Virginia. He has been extradited to Pennsylvania. Stephen Taylor has also been arrested in Virginia in connection with the case. Advertisement

Harvey's lawyer, John Notarianni, said Thursday that Harvey remains jailed and is 'denying all allegations, at this point.' Harvey is not charged with any crime related to the child victim.

Police said Parker said he sexually fondled the boy when he was 1 to 3 years old.

The boy told investigators Parker molested him on multiple occasions in Schuylkill County before he was age 13 and, according to a search warrant affidavit, 'would take him to homes or apartments where... other adults would touch (him) in a sexual way.'

The boy told investigators in October that Craig Michael Knox, 35, of Henrico, Virginia, had molested him at a home in Pittston.

Knox told investigators that Parker encouraged him to 'have at it' with the boy, and that he sexually abused the child in an upstairs bedroom. He said Parker also forced the child to perform a sexual act, according to police.

'Knox stated that during this time the victim appeared embarrassed and looked at the floor as he did what he was instructed to do,' police wrote.

Pennsylvania's Attorney General Josh Shapiro said a tip line set up for the case has received multiple calls in recent days and they believe there could be more perpetrators and victims

Knox was charged in November. A public defender listed on Knox's online court document declined comment.

The boy told an investigator on January 20 that Parker, himself a 'furry', took him in 2009 to the Quakertown home of Kenneth C. Fenske, 57, who on several occasions would remove his fox costume before raping him, police said.

Fenske was charged Friday with child rape and related offenses.