A 5-year-old girl contracted a sexually transmitted disease after being raped by a teenage family member earlier this year, authorities in Upper Darby, Pennsylvania said.
The 18-year-old suspect, whom NBC10 is not naming to protect the victim's identity, is charged with rape of a child, indecent sexual assault, endangering the welfare of a child and related offenses for the assault that took place a few months ago, police said.
"I guess the best way for me to describe this guy is an animal," Upper Darby Police Superintendent Michael Chitwood said.
Police said they learned about the rape on Tuesday when the girl's mother took the 5-year-old to the Children's Hospital of Philadelphia.
Doctors called authorities after test results came back showing the girl had chlamydia, Chitwood said.
At first, the mother was uncooperative, Chitwood said, but then she told detectives she was aware her daughter had been sexually assaulted in the 18-year-old's bedroom.
"The girl identifies the family member and says that 'he stuck his pee pee into my private parts,'" Chitwood said. "The little girl, 5 years old, anatomically knew what private parts meant: her vagina and buttocks."
The suspect, who is a native of Ecuador, has denied the rape, but admitted to having the STD, Chitwood said.
The teen is being held in the county prison on $250,000 bail. An attorney was not immediately listed for the suspect.
The girl's mother has not been charged in the case. Chitwood said the investigation is ongoing.