With each transaction, and many more disturbing videos sent, the seller was unknowingly providing a pile of evidence to an undercover agent with the Immigration and Customs Enforcement’s child exploitation unit.Current and former police, as well as nonprofits working directly with cops to fight child exploitation, say that such crimes are often happening via Cash App, which brings in billions in gross profit every year for Block, Inc., the Jack Dorsey-run payments giant formerly known as Square.Block says it does not tolerate crime on its technologies and that the company proactively scans transactions for suspicious signals that could indicate criminality, but the claims of illicit use of Cash App are supported by police department data and dozens of cases reviewed by Forbes in which the tool was used to facilitate sex crimes.Joe Scaramucci, a detective who set up the human trafficking unit for the McLennan County Sheriff's Office in Waco, Texas, says that in his experience, outside of physical cash, Block’s tech is the primary payment tool used by people selling sex, whether they’re trafficking adults or children.He complained about delays to getting responses from Cash App, taking far longer than rivals, leading him to question whether or not Block has invested in legal compliance in line with its explosive growth."