A Florida high school teacher who was previously sentenced to eight years for sending nude photos to a minor has pleaded guilty to having sex with a 17-year-old girl.

Brock Smith, 32, from Naples, agreed to a plea deal on Tuesday and had four years added to his previous prison term, for a total of 12 years.

Smith, who has two young children with his fitness instructor ex-wife, will also have to register as a sex offender and spend 12 years on probation.