This article has been updated from its original form.

A former supervisor at a Waterford school for at-risk children is accused of providing a teenage student with alcohol at a Griswold pond and sexually assaulting him at her home, according to a state police arrest report.

Nicole Souza, 38, of 315 Elm St., Apt. B, Stonington, was charged Friday with second-degree sexual assault, risk of injury to a child and illegal delivery of liquor to a minor.

Police began investigating Souza, the former supervisor for the Waterford Country Day school’s short-term family integrated treatment unit in June after learning of a “highly intoxicated” then-15-year-old boy being brought to The William W. Backus Hospital in Norwich.

A witness told officials she observed Souza and the teen engage in “sexual behavior,” police said. A second individual, who described Souza as his girlfriend, also told police he believed Souza and the underage student were in a sexual relationship.

Norwich police said the alleged victim was driven by Souza to Glasgo Pond in Griswold on June 14. A witness told police she saw the two consuming alcohol before engaging in “sexual activities,” according to the arrest warrant affidavit.

When interviewed by police, Souza denied having sex with the teen, but said they were friendly, with Souza passing on her cell phone number and offering rides even after the boy left the Waterford program.

Souza said she in one instance picked the teenager up at basketball courts near Norwich Free Academy before driving to Glasgo Pond with beer and whiskey. She said the boy and another individual drank all the alcohol, police said.

Souza told police she and the boy went out roughly five times to movies or walks, but denied allowing him into her home.

The alleged victim told police he and Souza had sex twice at her home, according to the warrant.

Souza was fired July 3 due to an “inappropriate relationship with a student,” school officials told police.

In a series of 27 text messages police said were exchanged between Souza and the teen on June 14, Souza, while the boy was being treated for alcohol consumption, asks a second party to delete her contact information.

“We will need space,” police said Souza texted. “Please tell (the alleged victim) I am truly sorry.”

Souza, who was initially held on a $50,000 bond, is due on Oct. 24 in New London Superior Court.