NAMPA -- Nampa Police are following up on every lead they get in hopes of finding 66-year-old Thomas Allen Lynch who was last seen one week ago.
His family says it's not unusual for him to go on overnight hunting trips, but he's never been gone this long.
Lynch is one of four people to disappear in the area in the last two months.
When four people disappear in eight weeks time investigators look to see if there is any connection, any similarities.
In the latest case, Thomas Lynch was last seen April 19.
Nampa Police say their detective work indicates Lynch was going out the Owyhee Mountains where he's been known to hunt.
Cell phone records show he last called a gas station in Jordan Valley, Oregon. But no one there remembers getting a call from Lynch and he never stopped by.
Exactly one month before his disappearance, Albert and Rita Chretien vanished.
The Canadian couple was traveling to Las Vegas and was last seen in Baker City, Oregon at a gas station.
And 17 days before that, 57-year-old Grant Moedl disappeared while driving from Rexburg to Boise. He was last seen at a gas station in Carey.
Detectives looking into the Lynch case say they have looked for connections, but found only one.
Other than just an unusual disappearance that they just disappeared, nobody knows what happened to them or their vehicles or anything like that, said Nampa Police Sgt. Tim Randall. Whether they intentionally disappeared on their own, whether they're stranded somewhere, it's just, we don't know.
Randall says Owyhee County authorities have searched by air and ground, but deputies have found no sign of Lynch.
He says they've had a few tips, but so far nothing has panned out.
In all three cases, investigators say they do not suspect foul play.
They're hoping for a break, something, that will help find them.
Anyone with information about any of these missing persons is urged to contact their local law enforcement.