That would not preclude Shamvestigation 3.0. Constitutional protections against double jeopardy don't forbid multiple Partisan PR Stunts at taxpayer expense regarding the same event.
After all, what else do that have to do but spend taxpayer money on

? They have no other purpose.
OK, yeah, the Murder Turtle's purpose in life is to count the money his wife gets from the Chinese shipping scam she has going.