Local governments in California's have legal authority to ban storefront pot shops within their borders, California's highest court ruled on Monday in an opinion likely to further diminish the state's once-robust medical marijuana industry.

Nearly 17 years after voters in the state legalized medical marijuana, the court ruled unanimously in a legal challenge to a ban the city of Riverside enacted in 2010.

The advocacy group Americans for Safe Access estimates that another 200 jurisdictions statewide have similar prohibitions on retail pot sales. Many were enacted after the number of retail medical marijuana outlets boomed in Southern California after a 2009 memo from the U.S. Justice Department said prosecuting pot sales would be a low priority.

However, the rush to outlaw pot shops has slowed in the 21 months since the four federal prosecutors in California launched a coordinated crackdown on dispensaries by threatening to seize the property of landlords who lease space to the shops. Hundreds of dispensary operators have since been evicted or closed voluntarily.

Marijuana advocates have argued that allowing local government to bar dispensaries thwarts the intent of the state's medical marijuana law - the nation's first - to make the drug accessible to residents with doctor's recommendations to use it.

The Kentucky Court of Appeals has upheld the conviction of a former death row inmate in a 1998 slaying in Lexington.

The appeals court on Friday found that 40-year-old Gerald Young failed to prove his allegation that prosecutors put on false testimony at his trial.

Young is serving life in prison for complicity to commit murder in June 1997. Young was originally sentenced to death for hiring a hit-man to kill Osama Shalash in Lexington as part of a drug dispute.

The Kentucky Supreme Court in 2001 overturned the death sentence, finding no aggravating circumstances to warrant capital punishment. Young is currently challenging his resentencing. Two other men were also sentenced to prison in the slaying.