An Indiana man was sentenced Friday to 50 years in prison for using social media to produce child pornography.

33-year-old Lorenzo Johnson, of Hammond, was convicted on Aug. 16 by a federal jury of three counts of conspiring to produce child pornography, one count of distribution of child pornography and one count of being a felon in possession of a firearm.

According to court documents, Johnson used Facebook accounts in the names of others to identify women with access to children who were experiencing financial difficulties.

Johnson, a registered sex offender, offered those women money to take sexually explicit photos of infants and prepubescent children they knew. Three women agreed to do so, and are now facing criminal charges as well.

In an interview with the FBI, Johnson admitted he also blackmailed people into producing child pornography.

Johnson was previously convicted in 2009 in Illinois of aggravated sexual abuse involving a minor.