His sister later reported heavy use of cannabis as being the main cause.

While once known for his use of cannabis, he has recently quit using the drug.

For additional information, see Religious and spiritual use of cannabis.

Police search his home and discover more evidence of cannabis use.

And in all countries that reported data between 1999-2005 the number of people seeking treatment for cannabis use increased.

However, individuals who started cannabis use after the age of 18 did not show similar declines.

However, the relevance of these results to human cannabis use has not yet been determined.

The study found there was no link between cannabis use and criminal behavior.

He began a campaign to encourage personal use and cultivation of cannabis.

Find out about use, possession and cultivation of medical cannabis in your state.