Last week, a number of medical marijuana patients and supporters, including MPP’s Dan Riffle, were at the Maryland statehouse to testify on the need to protect medical marijuana patients from arrest. Here is some TV coverage of the hearing: The bill, sponsored by Sen. David Brinkley, is based on one of two draft bills proposed by members of Maryland’s medical marijuana workgroup. Only one version, the one suggested by Del. Dan Morhaim and MPP’s director of state policies Karen O’Keefe, would provide…