They were grossly incompetent. The CIA operation in Benghazi went up in flames and their response was to piss their pants and do nothing. Is that a crime? Is lying about it a crime?
I'm certain you will find some procedural "crimes" in this fiasco. Tampering with witnesses and evidence. But nothing that rises to the level of "high crimes and misdemeanors". We can hope, but I don't see it.
Using the ATF to flood Mexico with guns is a crime. Using the IRS to intimidate your political opposition is a crime. How about not enforcing laws you don't like (DOMA, immigration laws)? Is that a crime?
The real crime in this case was perpetrated by the American people upon themselves. That would be the election and re-election of a communist, moslem, anti-American, non-American, racist as president. These other events are simply the result.
Lying to Congress is a crime for starters.
It is called perjury.
Obstructruction of justice is a crime.