SCHENECTADY – A teacher's aide from a Schenectady special education school was arrested Monday and accused of having sex with a 15-year-old student a year ago, police and prosecutors said.

Alexandra Culhane, 24, of Scotia is charged with felony rape and felony criminal sex act.

Culhane allegedly had oral sex and intercourse with a 15-year-old male student in early April 2016 in Schenectady's Central Park, Schenectady County Assistant District Attorney John Carson said Tuesday.

Her arrest comes one week after a teacher from the same school was arrested for allegedly assaulting another teenager in the hall, state prosecutors said.

Both defendants worked at The School at Northeast, a special education school in Schenectady that serves children from grades 6 to 12. The school is run by Northern Rivers Family of Services, a child and family services conglomerate with offices 12 eastern New York counties. Northern Rivers is licensed by the state Education Department.

Staff reported Culhane's alleged behavior to city police in 2016, Carson said. The district attorney's office, the Schenectady Police Department and the state Justice Center for the Protection of People with Special Needs investigated the case.

The school removed Culhane from her duties when the investigation began and then fired her in February, Northern Rivers spokesman Eugene White said Tuesday. Culhane had worked for the company for about a year.

"We constantly monitor and supervise all of our facilities," White said. "If something happens, we want to uncover it immediately and take corrective action. ... Transparency and accountability are vitally important."

Culhane was also the junior varsity field hockey coach for the Scotia-Glenville High School in fall 2015 and fall 2016, district spokesman Bob Hanlon said Tuesday.

She is not a current Scotia-Glenville School District employee, since her position is seasonal and requires yearly appointment, Hanlon said. He added that the district never had concerns or complaints about her coaching.

In the other case, former teacher Ryan Johnson, 45, of Saratoga is accused of grabbing a student by the neck before forcing the teen against the wall and onto the floor on March 16, the Justice Center said.

Johnson was arraigned on June 5. He is charged with misdemeanor endangering the welfare of a child, misdemeanor attempted assault and harassment, a violation.

The alleged March 16 attack ended when other Northern Rivers employees intervened, prosecutors said.

"We appreciate the prompt actions of the staff members who intervened before the victim was injured, and who immediately reported the incident to the Justice Center," Special Prosecutor Patricia Gunning said in a June 9 news release. "Without conscientious workers who report abuse when they see it, many instances would go undiscovered."

Johnson was removed from duty immediately and fired soon after, White said. He has been a school employee for about six months.