SANTA ANA (KTLA) -- A well-known Orange County swim instructor was sentenced Friday for having sexual relations with a former teenage student.

Irvine resident Todd Robert Sousa was sentenced to 16 month in state prison Friday. He was found guilty earlier this year on 13 felony counts of lewd acts with a child and three felony counts of unlawful sexual intercourse.

Sousa also will be required to register as a sex offender.

The 15-year-old female student and her mother reported last month that she had sex on four occasions with her swim coach, Orange County Sheriffs Spokesman Jim Amormino said.

Sousa, 37, was arrested Feb. 25 at J. Serra Catholic High School, where he was coaching.

According to reports Sousa, founder and executive director of Swim Venture, admitted to having sex with the young girl during police questioning.

Prosecutors allege Sousa attacked the girl multiple times in an office, an equipment closet and in a car.

They also said Sousa reportedly gave alcohol to the girl and a friend, who stood guard outside a room while he had sex with her.

"He certainly violated a position of trust," Amormino said. "These parents trust this man with their young children."

Sousa's company, which he has been operating with his wife since 1994, leases pool space form campuses for swim lessons and is not employed by any schools.

They taught throughout Orange County, including in Aliso Viejo, Laguna Niguel, Mission Viejo, Ladera Ranch and Dana Point.