What’s to investigate? The Amazing Horowitz already did a thorough investigation and cleared Eric Holder of all wrongdoing.
Jk. Obama appointed Horowitz so of course he’s tame.
Correct me if I am wrong but my understanding of Horowitz’s report on F&F was based on the Information DOJ would provide him. That there was a big fight over the information and Holder/Obama won it. So Horowitz never had access to memos, emails etc he wanted/needed.