The U.S. Supreme Court on Monday left a lower court ruling in place that struck down a law making it a crime to sleep in public places when homeless shelter space is unavailable.

A federal appeals court had ruled that the anti-camping ordinance in Boise, Idaho, was cruel and unusual punishment, violating the Constitution's Eighth Amendment. "A state may not criminalize conduct that is an unavoidable consequence of being homeless," the appeals court said.

The Supreme Court denied Boise's appeal Monday without comment, as is its normal practice when declining to grant reviews.

Lawyers for the city argued that Boise wanted to enforce the ordinance "in the parks, foothills, and other public areas not just to keep them safe and sanitary but also to allow users to utilize the public spaces as they were intended to be used." Supporters of the law said people sleeping on the streets are unsafe and make residents feel less safe.