A bipartisan group of House lawmakers introduced a bill this week designed to create enhanced legal protections for valid medical marijuana patients prosecuted due to conflicting state and federal laws regarding the legality of the substance.

Under the Truth In Trials Act, sponsored by California Democratic Rep. Sam Farr and co-sponsored by other representatives such as Barney Frank (D-Mass.) and Ron Paul (R-Texas), state-licensed medical marijuana users would be given the right to provide an "affirmative defense" in the case of a federal prosecution. This effectively allows them to prove that their actions, while illegal at the federal level, were in fact protected under state law.

"Any person facing prosecution or a proceeding for any marijuana-related offense under any federal law shall have the right to introduce evidence demonstrating that the marijuana-related activities for which the person stands accused were performed in compliance with state law regarding the medical use of marijuana, or that the property which is subject to a proceeding was possessed in compliance with state law regarding the medical use of marijuana," the bill reads.

The legislation also lays out specific language stating that cannabis plants grown legally under state law may not be seized. Under the legislation, marijuana and other property confiscated in the process of a prosecution must also be maintained -- not destroyed -- and returned to the defendant if they are able to prove it was for a use accepted by the state.

The latest version of the Truth In Trials Act comes as federal crackdowns on dispensaries in medical marijuana states continue to surge. Last week, federal officials targeted one of the nation's largest pot shops. The Associated Press reported:

U.S. Attorney Melinda Haag has threatened to seize the Oakland property where Harborside Health Center has operated since 2006, as well as its sister shop in San Jose, executive director and co-founder Steve DeAngelo said Wednesday. His employees found court papers announcing asset forfeiture proceedings against Harborside's landlords taped to the doors at the two locations on Tuesday.