Important to remember that IG Horowitz was stonewalled when all the early sheit was going on and was denied access to NSD records.

http://archive.ph/zfoSv

https://www.justice.gov/sites/default/files/olc/opinions/attachments/2015/07/23/2015-07-20-doj-oig-access.pdf

https://oig.justice.gov/testimony/t140909.pdf