46 year old Anthony Cebula of Binghamton was arrested for rape in February.
The case involves a girl from Windsor.
The Broome Sheriff's Office says further investigation uncovered 200 images of child porn on Cebula's computer.
He faces an additional federal charge of Receiving and Possessing Child Pornography.
Cebula was a school crossing guard in Binghamton, and former member of the police auxiliary.