For Sex Traffickers, Jack Dorsey's Cash App Is 'King'

Earlier this year, Kik Messenger user "heyyyydude1" was selling a stash of videos he'd amassed of child sexual abuse. One customer, who said he was a 35-year-old father of two, offered to buy 200 videos for $45. "How do I pay?" he asked. "Cash App," heyyyydude1 responded, sending over his payment details and a code for a Cash App referral fee. With each transaction, and many more disturbing videos sent, the seller was unknowingly providing a pile of evidence to an undercover agent with the Immig