While there are many wonderful police investigators out there doing some very fine work, the majority of the time it is not brains that catches serial killers. ↗
Prior to the PATRIOT Act, the ability of government agencies to share information with each other was limited, which kept investigators from fully understanding what terrorists might be planning and to prevent their attacks. ↗
It's rather naive, apart from being ethically objectionable, to assume that our investigators travel around the country with bags of money trying to bribe witnesses to lie on the witness stand. We just don't operate that way. ↗