JACKSON, MI - The recently passed bill strengthening Michigan's ban on K2, bath salts and other synthetic drugs closed a loophole that made prosecution under the old law nearly impossible. The Jackson County Prosecutor's Office declined to prosecute two "significant investigations" under the ban passed in 2010, said Chief Assistant Prosecutor Mark Blumer. "It was nearly impossible to enforce because of the way it was written," Blumer said of the old law. "We're always happy when the legislature corrects what are seen as faults and holes in the law." The new law, signed by Gov. Rick Snyder Tuesday, closed a loophole in the 2010 ban that rendered it essentially moot. K2, also sold as Spice, Happy Smurf, Mr. Nice Guy and a host of other names, is an herb coated with chemicals that produce a high when smoked. The 2010 ban outlawed specific chemical formulas. Chemists quickly changed the formula, creating a drug immune to the ban.