One of the primary way too defend against drug charges is to challenge the manner in which law enforcement seized the drugs. This can be done in several different ways. Defending Intent to Deliver cases First, you can challenge the manner and the basis for which the police stopped the accused's car or person. Second, you can challenge the police officer's decision to search an accused's car or person for illegal narcotics. And finally, you can also challenge whether the police had probable cause to arrest a defendant for either the possession or distribution of illegal narcotics.