The U.S. Marshals Service offered a $10,000 reward Saturday for information leading to the capture of a man accused of killing a Utah sheriff's deputy in the Arizona town of Fredonia.
Authorities say 23-year-old Scott Curley vanished after he fatally shot 41-year-old Kane County Deputy Brian Harris on Thursday and was believed to be hiding in the wilderness on the Arizona-Utah line.
"There is somebody out there that knows where this guy is," said David Gonzales, U.S. marshal for Arizona.
Harris was shot Thursday while chasing Curley, who was suspected of trying to burglarize Fredonia High School and holding a janitor at gunpoint on Wednesday night.
The janitor was unharmed, and Curley avoided authorities until Thursday.
A manhunt was under way for Curley. More than 300 law enforcement officers from 36 agencies have taken part in the search.
Investigators say Curley was armed with an assault rifle.
Authorities described Curley as a person who suffered from depression and had few friends. He is likely fatigued and hungry since being on the run, but is familiar with the wilderness near Fredonia.
"He knows how to live under the cedar trees, under the sage brush," said Lamont Smith, sheriff of Kane County.
Police have searched abandoned buildings and used tracking dogs to find foot tracks, but those efforts haven't panned out.
Gonzales said authorities will likely begin in the coming days to approach the search as a fugitive investigation into whether he is in other states.
The marshal said Curley could have hitchhiked out of his community and gone elsewhere. "He could have gotten a ride somewhere with somebody, with a friend, and he might be God knows where, in another state," Gonzales said.
From Fox News.com