For years, the chief of the Border Patrol was a member of the secret CBP Facebook group for racist and threatening chatter

Last week, Propublica revealed the existence of "I'm 10-15", a secret Facebook group for current and former Customs and Border Protection employees -- a group with 9,500 members, while CBP's total workforce numbers 58,000 -- where it was commons for members to share violent, racist, sexist, misogynist, rape-y memes, including some that threatened and disparaged members of Congress.

At the time, CBP officials acted surprised to learn of the group's existence and vowed to investigate any misconduct there.

The Intercept has been mining the group's archive to learn about the identities and activities of its members, and today, they revealed that CBP Chief Carla Provost was an active member of I'm 10-15 for some years, and posted more than once to it. While Provost's posts are innocuous, her presence on the group suggests that the CBP's official claims to be surprised at the group's existence and character were not entirely truthful.

Provost is not the only high-ranking CBP official who was also a member of I'm 10-15, and some CBP officials' social media activities were less benign that Provost's. For example, Border Patrol Calexico supervisor Tom Hendricks, a 20+ year veteran of the service, posted a meme depicting "a smirking Trump forcing Ocasio-Cortezs face into his crotch by the back of her neck."

Evidence of Provosts participation in the secret Border Patrol group comes as Ocasio-Cortez, along with Rep. Veronica Escobar, D-Texas;, Rep. Rashida Tlaib, D-Mich.; and Rep. Ayanna Pressley, D-Mass., head into a hearing with the Committee on Oversight and Reform and the inspectors general of DHS and the Department of Health and Human Services on Friday to discuss their recent visit to detention centers along the border.