Federal laws governing criminal justice operations in the United States are few and, in some instances, conflicting.  Restrictions are placed on some types of investigations that are absent in others, for example.  The Caprioni testimony refers to this. Other countries have centralized police powers with the ability to enact laws that guide all investigation and intelligence operations.  This past year, some jurisdictions passed laws legalizing possession and sale of marijuana, while it remains a federal violation.  

Given these activities, why or why not  we should have national laws governing intelligence operations?