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MOAB -- The park ranger shot near Moab was went from serious condition to critical condition Monday night.
A spokeswoman for St. Mary's Hospital in Grand Junction, Colo., says Brody Young, 34, now battles infections from his wounds.
Prosecutors have filed charges of attempted aggravated murder against the only suspect in the shooting, Lance Leeroy Arellano.
Police consider Arellano, 40, armed and dangerous, if he's still alive.
Young, 34, was shot at least three times, in the arm, leg and stomach, after stopping a vehicle at the Poison Spider Mesa trail head last month. A car found near the scene of the shooting is registered to Arellano.
A massive search in a rugged area near Moab failed to find him.