Prince, America’s most famous private military contractor, acknowledged last week that he “cooperated” with Mueller’s investigation of Russian interference in the 2016 presidential election after falling under scrutiny amid questions about an alleged effort to establish a backchannel between the Trump administration and the Kremlin, something Prince has vehemently denied.

ABC News has since learned that Mueller is also reviewing Prince’s communications, a sign that Mueller could try to squeeze Prince, as he has others, probing potential inconsistencies in his sworn testimony in an attempt to pressure him to turn into a witness against other targets of the investigation. In response to questions from ABC News, a spokesperson for Prince released a statement noting that Prince has provided Mueller with “total access to his phone and computer.”