If law enforcement can approach it from an intel prospective instead of a law enforcement one, CID/LE can be a great asset to intel exploitation. Crime scene analysis, confidential sources, evidence handling, and subject interviews for example all have direct applications to intel (sensitive site exploitation, HUMINT, DOMEX, interrogations). Problems arise when the way LE does things bumps up against the way intel does it, like reading detainees their rights and putting them in general pop before intel is done with them.
I've worked with LE before and it has almost always been a positive experience, but if you're trying to do something intel-related, it needs to be done in an intel facility with an intel OIC, with LE in a support role.
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