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COLUMBIA, Mo. (AP) - Missouri prosecutors advising police on undercover investigations now have greater legal protection that their conduct won't violate ethical rules.

A recent change to the Missouri Supreme Court's Rules of Professional Conduct explicitly allows government lawyers to collaborate on undercover operations without risking sanction for professional misconduct.

The amendment further codifies a tactic that former Cape Girardeau County prosecutor Morley Swingle calls "the oldest trick in the criminal investigator's book" - lying to a suspect to help solve a case. Swingle is now an assistant U.S. attorney.

Missouri is among 10 states to make similar revisions to its conduct codes for lawyers. Many came in response to a Colorado case in which a prosecutor's law license was suspended after he posed as a public defender to elicit a murder confession.

Three children are in the hospital after a car accident in north St. Louis Wednesday morning.

Police say two vehicles collided at the intersection of Goodfellow and Wells. One of the cars flipped over and two people were trapped inside.

Everyone was freed from the overturned car and the kids, along with two adults, were taken to the hospital. Their conditions are not known at this time.

DALLAS (AP) - A hotel guest from Missouri has been found dead in the atrium lobby of the 30-story Hyatt Regency Dallas after apparently falling from an upper floor.

Dallas police say a hotel security guard early Wednesday discovered the body of 37-year-old Craig McKinnon Berry of Wentzville, Mo. A police report says a hotel employee heard a loud thud and contacted security.

A hotel spokesman says the guest apparently fell from one of the upper floors. The downtown Dallas hotel's interior atrium has 18 stories.

Police are investigating the incident as an unexplained death. Further details weren't immediately available.