GUILDERLAND — A state parole officer was Tuesday arrested after he allegedly raped a parolee in her Guilderland home.

Nicholas B. Kordas, 50, of Clifton Park, was arrested by State Troopers, for first-degree rape, after a five-month investigation, according to a press release from the New York State Police Bureau of Criminal Investigation.

The investigation began on Jan. 13, after the 23-year-old parolee told staff at Albany Medical Center that she had been raped by her parole officer while he was performing a curfew check. A DNA sample was collected at the hospital, and was sent to the state’s forensic investigation center with a DNA sample from Kordas, the release said.

Marc Violette, a spokesperson for the state Division of Patrol, said Kordas was suspended indefinitely without pay after the charges were filed. Kordas had been a patrol officer for 12 years, said Violette.

There are roughly 800 parole officers in the state, and they supervise over 40,000 inmates transitioning back into the community after serving time in prison for a felony, according to Violette.

Parole officers promote law enforcement and community safety, and also serve as social workers; Violette said parole officers are required to have a four-year degree in a social science, and several years of experience in the field, before they are hired.

Felons are assigned a term of “community supervision,” ranging from one year to life. They are assigned a parole officer, who imposes certain conditions based on need. Conditions can include drug-testing, anger management, therapy, job counseling, and a curfew, said Violette. The parole officer will construct a schedule for the parolee, mandating periodic meetings; the officer also has the authority and jurisdiction to show up unannounced at the parolee’s house or place of employment.

One of the main reasons a parole officer makes unannounced visits is to make sure the parolee is obeying curfew, Violette said.

Violette said he could not comment on Kordas’s case because the matter is still under investigation, but, he said, with over 800 parole officers statewide, violations of rules and regulations do happen. Violations are not, however, a frequent occurrence, he said. The Division of Parole immediately suspends an officer accused of a violation.

The Kordas investigation did not reveal any other victims, according to the BCI release.

Kordas was arraigned in Guilderland Town Court and posted bail in the amount of $75,000. His case will be transferred to Albany County Court, and he will appear before the grand jury at a later date.