No foul play is suspected in the case of a veteran who went missing a week ago, the Maricopa County Sheriff's Office said on Thursday.

Joseph Casey went missing on June 21 at the north end of Lake Pleasant around 4:30 p.m.

The 34-year-old Navy veteran and off-roading enthusiast had his Jeep break down in the rugged terrain near the lake, MCSO said. A woman was with Casey at the time, and she reportedly told investigators after his vehicle broke down, Casey got into another unknown vehicle and hasn't been seen since.

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[ORIGINAL STORY: Search underway for missing veteran last seen north of Lake Pleasant]

"We want to make sure we conduct a thorough investigation so that we can do our best to locate him. Hopefully, we can do that."

The woman is said to be cooperating with investigators. Casey's Jeep has been impounded and is part of the investigation.

On Wednesday, volunteers from the off-roading community searched for Casey in the area where the Jeep was found. There were no signs of Casey, and on Thursday, the search was suspended.

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"We are just praying and hoping that whatever happened, that he is found and comes home, you know," said Tamara Clapp, a neighbor.

The Sheriff's Office is emphasizing that it is an active missing person case and anyone with information concerning the whereabouts of Casey is encouraged to call MCSO or call Silent Witness at either 480-WITNESS (948-6377) or 1-800-343-TIPS (8477). Spanish speakers may call 480-TESTIGO (837-8446). (Click or tap phone number to call from this story on your mobile device.)

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