SAN JUAN, Puerto Rico (AP) — A Puerto Rico man has been sentenced to 50 years in federal prison after pleading guilty to production of child pornography involving his daughter and four stepdaughters.

Luis Alberto Morales Badillo was accused of sexually abusing and engaging in sexually explicit conduct with the underage girls from 1999 to 2010.

U.S. Attorney Rosa Emilia Rodriguez said late Friday that one of the girls was 4 years old at the time.

The 42-year-old nurse was charged in May 2012 and pleaded guilty in November.