NEW YORK -- A sergeant formerly assigned to New York City's Police Academy has pleaded guilty to sexually abusing a young boy for several years, at times at a relative's home in New Jersey.

Jaime Katz pleaded guilty to second-degree sodomy and endangering the welfare of a child. Prosecutors said the sex abuse began in 2003 when the boy was 12 and continued into 2007.

Katz, who's 39, was a police officer for 10 years. He is a former president of the Gay Officers Action League. He will be sentenced March 31.

Katz has pleaded guilty to similar charges involving the same boy in Rockland County. He is to receive a five-year sentence there March 23.

Prosecutors says some encounters with the boy occurred at a Katz relative's home in Bergen County.