(Portland, OR)  --  A convicted sex offender is facing dozens of new charges of sexual abuse.  Police booked Mahoney "Jason" McKeon into Multnomah County Jail Tuesday on 56 charges of first-degree sex abuse and ten charges of first-degree encouraging child sex abuse.  Investigators say McKeon subjected a girl under the age of 14 to sexual contact for more than two years between 2015 and 2017.  He's also accused of producing, exchanging, financing or selling child pornography.  McKeon was convicted last year of online sexual corruption of a child.