A Colorado couple are suing state police who confiscated their marijuana plants, claiming that when the plants were returned, they were dead. James and Lisa Masters say they were using the marijuana to treat medical conditions, although at the time they had no license to do so. Now that they do have a valid prescription, they say, they should be compensated for the three dozen plants. A spokeswoman for the Fort Collins police said, however, that “the normal process of confiscating contraband does not require jurisdictions to keep it alive.”