This guy has opened the way for the defense to claim that there was at least one agent on scene whose hatred of Muslims demostrably outweight his respect for the suspect's rights or the rule of law. That could easily open up grounds for 'reasonable doubt'.
This guy shouldn't be suspended--he should be outright fired and charged with evidence tampering, especially if his malfeasance allows Shishani to walk. Further, he should be fired not only as punishment, but also because his demonstrable lack of judgement in this case would jeopardize the value of evidence gathered in future cases.
The USSS agent deserves a slap on the wrist, and nothing else. Hell, I'd even consider promoting him since he understands that "Islam is evil", something our "leaders" apparently fail to grasp.
As for the bad guy possibly walking, that's not the Agent's fault that we have a corrupt and illegitimate court system that coddles predators while infringing on the Rights of Free men and women.
The "malfeasance" here has been committed by the "domestic enemies of the Constitution" who have peverted our justice system to the degree that we cannot fight our true foreign enemies that are living in the United States.
Back when the word "enemy" actually meant something, the fraudulent check writer (and probable enemy agent) would have already been put before a jury of his peers and dealt with. The newspapers would run cartoons mocking the stupidy of the enemy agent who got caught (and his asenine rantings during the trial, which would undoubtedly occur). Americans would laugh at these cartoons and the Agent would head out for a beer and a steak with a tall blonde on his arm.
And back when the word "enemy" actually meant something, a group of patriotic Americans (all wearing pistols on their hips) sitting at this same resturant, laughing at the said cartoons, would buy this Agent and his date the most expensive steak on the menu. Handshakes would be exchanged and new friends made.