(BAD AXE) -- The son of the late sex research pioneer Dr. William H. Masters was sentenced in Huron County Circuit Court Monday afternoon in an indecency case. William H. Masters III was sentenced to 30 days in jail, 18 months probation and 50 hours of community service. He was also ordered not to enter Michigan's Port Crescent State Park. The 61-year old pleaded guilty in December to an indecent exposure charge for exposing himself to a sheriff's deputy and another woman on the Pinnebog River in Huron County. Authorities say a completely nude Masters yelled for the women's attention on September 1, then made obscene gestures. The crime carries up to 2-years in prison. The Southhampton, New York, resident also pleaded guilty to performing a lewd act in Central Park last year.