CDA

The CDA (Child Detection Agency) are major characters in the Monsters Inc. franchise. 
The organization appears to be a HAZMAT containment agency. As humans are claimed to be extremely venomous, their task is to eliminate such sources, primarily objects coming into this world. They come in a wide variety of forms and all wear full-body suits, to avoid contamination and presumably conceal their identities. If any human object appears in the Monster World, they arrive to destroy it using a metal dome that will cause whatever is placed under it to explode harmlessly and decontaminate any who come in contact with such objects. Their decontamination methods are often painful: Anyone who has been decontaminated by the CDA will be forced to wear a plastic cone over their heads like a pet who has been given surgery and is not allowed to lick the wounds. 
==History==
===Monsters Inc.===
The CDA is first seen arriving at the Monsters, Inc. factory after Jerry calls the agents upon hearing Charlie's alert about a child's sock on George Sanderson's back. The agents arrive at the factory to remove the sock, which is then destroyed into smithereens, and its remains are vacuumed up. Then the agents decontaminate George by shaving his fur off, having him showered, and placing a cone on his head. The agents are seen again arriving at Harryhausen's after the Bartender calls the CDA about a human girl nicknamed Boo in the restaurant. They arrive at the restaurant and round-up almost every patron, including Celia Mae, for decontamination, and they envelop the restaurant in a gigantic green force field.
The CDA deployed in full force when all of Monstropolis became aware of the incidents of Boo's invasion into the Monster World, and the Monsters, Inc. facility was thoroughly searched for evidence. Upon learning that Mike Wazowski and Sulley are the ones who have brought Boo in, Mr. Waternoose tried to have the CDA arrest Mike and Sulley so that he could take Boo and forcefully extract screams from her. However, Mike and Sulley expose Waternoose' schemes to the CDA, and he is arrested. Roz, who reveals her identity as CDA's leader, congratulates Sulley for their efforts, as while they nearly ruined her own investigation, the CDA would not have discovered any links to Waternoose otherwise.
When Sulley discovers that laughter is more powerful than screaming and humans were not even toxic in the first place, the CDA is no longer necessary. In place of it, comes the Comedy Detection Agency. Their job also changes to solving if a joke is funny or not. However, it's unknown whether or not this is actually canon, because as far as we know, that name was only mentioned in "Monsters, Inc. Laugh Floor". Also, at the beginning of Monsters, Inc.: Laugh Factory issue number 4, the headquarters show the name "Crime Detection Agency" on the side.
===Monsters University===
The CDA make a small cameo near the end of the prequel. Following Mike and Sulley's intrusion in the Human World, emergency was declared and the CDA was dispatched to take charge of the situation. Roz is seen overseeing the operation.
==Gallery==
Asking_Sulley_for_an_autograph.jpg
Mike Wazowski is in front of the CDA forces..jpg|Behind Mike Wazowski
CDA forces (The plot was revealed).jpg|Convinced by Mike's video recordings
Mr. Waternoose, you are under arrest..jpg|The CDA turns on Waternoose and arrests him.
Monsters-inc-disneyscreencaps.com-9102.webp
MU-CDA-trailer 3.jpg
==Trivia==
*The CDA reform later in Monsters, Inc., but are only sometimes neutral characters and not villains, as they are simply doing their job.
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