The 16-year-old student told cops Duru touched his nipples inappropriately during two separate instances on Feb. 10.
Duru was released without bail.
His sister, Amarachi Duru, said she the charges against her brother were a “misunderstanding,” adding that he is an extremely religious man who is getting his masters.
“When I saw the news I started crying because I don’t think that’s something my brother would do. The story is all messed up,” she said. “It’s not like him at all and anyone who knows him would know.”
Duru has been a substitute in city schools since only December 2011. He was suspended from his job when he was arrested.
“We are cooperating with the police investigation,” said agency spokeswoman Deidrea Miller.
The school, located at 800 Home St., is on the same campus as Dr. Richard Izquierdo Health and Science Charter School, where another teacher was arrested Thursday for allegedly punching a sixth-grader.