Brad Pitt may have found the trump card in his custody battle with Angelina Jolie — although it’s not something he’s happy about! The National ENQUIRER has learned Angelina has links to a pervert arrested for child sex crimes and that Brad hit the roof over fears she may have exposed their kids to him! The “Maleficent” beauty invited twisted sicko Joel Davis to attend a 2014 United Nations conference about ending sexual violence. Davis posed as an activist, but behind closed doors had sex with a 13-year-old boy and begged undercover FBI agents for sexual images of children as young as two, according to federal court papers. Read on for details of this latest wrinkle in the Pitt-Jolie divorce, and click here for more news of celebrity splits….