Congressional committees can only investigate, then write a report and send a referral to the DOJ. Once they’ve done that their job is done. If the DOJ is in enemy hands and takes no action on the referral there’s little that can be done. As I remember it Gowdy did that.
I don’t remember Gowdy writing much of anything. I was watching and just didn’t see it. But it’s a congress critter’s job to whine, bitxh, yell, and go stompy feet, to bring attention to a problem. Cutting funding to pet projects seems to work. Pelousy did. Gowdy quit.
I’m not a big fan of the collegial method of waddling thru Congress. Kind of like going SKorean occasionally.