SHASTA COUNTY (CBS13) — A man on the run for allegedly killing his wife and two daughters in Shasta County is now one of the U.S. Marshal’s most wanted.

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Shane Miller, who has been on the run for the nearly three months, has a new home—the Top 15 list of most wanted criminals.

“We chase fugitives and we’re good at it. Shane Franklin Miller is at the top of our list.”

The 45-year-old Shasta County man allegedly murdered his wife and two children in May at their home in Shingletown. Detectives say Miller’s wife and daughters, ages 8 and 4, were shot multiple times.

“Miller had threatened to kill his wife on the day of the murder as she and the children were going to leave on the day of the murder,” said Shasta County Sheriff Tom Bosenko.

The U.S. Marshal is adding more deputies to track him down, but they will be proceeding with caution as the suspected murderer seems to have a strong desire to collect powerful guns and ammunition.

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Bosenko said a raid of Miller’s property revealed 66 long-gun rifles, one crossbow and more than 100 rounds of assorted ammunition.

The man previously convicted on gun and drug charges remains on the loose nearly three months after the May 7 killings.

With no luck tracking him so far, deputies worry Miller may be living in an old abandoned cabin deep in California’s forest.

“We have information that he is a prepared outdoorsman survivalist type who can live off the land.”

He was last seen in Humboldt County. His truck was recovered there, but Miller was not. There is a concern he may still go after family members or law enforcement trying to track him down.

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There is a $35,000 reward for information leading to his arrest.