Police say on Dec. 21 a gift bag with a key chain and note were left in the locker of a 13-year-old girl.
On Valentine's Day, police say, Avila left candies for the girl. Police say the next day he asked her to come to his office, where he gave her a pack of gum with a $100 bill inside and his cell phone number written on the bill.
Also on Feb. 15, police say Avila text messaged a 14-year-old girl inviting her to the movies.
Avila was arrested Thursday night at his Uniondale home. Police did not know if he had an attorney.