Cary Academy Director of Advancement Lynne Fountain said in a news release the alleged victim - while a minor - is not a current or former Cary Academy student. According to Cary investigators, the victim is a 14-year-old boy.
The victim's father was the first to call 911. He was with the child waiting for his mother to get off work. The mother is believed to be a contract worker at the school.
In the 911 call, the father told the operator that his son went inside the gym to use the bathroom, and the suspect, 36-year-old Alfredo Martinez Lopez, went inside the bathroom with the child and molested him.
The alleged incident happened Friday.
"As soon as this became knowledgeable to us police were called. Police immediately started talking to the alleged victim," Fountain said.
Fountain said an arrest warrant has been issued for a contract worker from a local cleaning company.
"We would like to put other parents fears at ease and let me them know that, obviously, take the normal precautions you would with your children. But we have no reason to believe he's going to return there or return to another school to commit a similar act," Cary Police Captain Don Hamilton said.
"When we are dealing with an outside company like we were with this company background check were done. And we have background checks on file," Fountain said.
"I am saddened that this alleged incident took place on our campus," said Head of School Mitch McGuigan in a statement. "Our concern is for the alleged victim and the family."
Upon his arrest, Lopez will be charged with three counts of statutory sex offense and, if convicted, will face up to 16 years in prison.
Anyone with information is encouraged to contact the Town of Cary Police Department at (919) 469-4012 or Cary Crime Stoppers at (919) 226-CRIME.