Indiana lawmakers heard more than four hours of testimony Tuesday on the regulation of marijuana and related substances.

THC products and potential cannabis decriminalization are among the topics lawmakers may study this summer. The topic selection was part of the General Assembly's one-day technical session.

The Indiana Democratic Party is launching a statewide tour to promote cannabis legalization. And coinciding with the launch on 4/20 -- an unofficial weed holiday -- Democratic Senate candidate Tom McDermott released an ad in which he smokes a joint.

A new organization of business leaders has formed to advocate for the legalization of adult use of cannabis in Indiana.

A total of 11 bills dealing with medicinal cannabis or hemp have been introduced this session.