LIVINGSTON, TX (KTRE) - Investigators say they've been able to verify that a missing mother and her son were last seen in Lufkin.
Lt. Craig Finegan with the Polk County Sheriff's Office said Lettie Fisher, 79, and her son, John Fisher Jr., 31, were last seen at a doctor's appointment in Lufkin around 12 p.m. Monday, Sept. 19, 2011.
The search for the two Polk County residents was called off a week later.
"We've refocused our efforts," said Tyler County Sheriff David Hennigan. "We're looking at possible criminal activity now."
Investigators initially thought Lettie Fisher and her son went to Magnolia Ridge Park, in the B.A. Steinhagen Lake area on Monday to fish.
They were reported missing Thursday after a park officer noticed their vehicle in the same spot for days. Lettie Fisher's purse and money were still in the car, according to the sheriff's department. Initially Hennigan did not suspect foul play.
"All I'm doing is hoping and praying that they return alive, well and safe," Lettie Fisher's husband John Fisher said.
Fisher said his son is mentally handicapped and also has a prosthetic leg. His wife and son normally go fishing together.
After cadaver and scent dogs, a dive team, underwater cameras, and a DPS helicopter returned no leads, Hennigan said investigators now believe the pair may have never been out at the creek.
Since the two were last seen in Polk County, but their vehicle was found in Tyler County, the two departments are working on a joint investigation.
Hennigan said they have no suspects at this time.
The Texas Rangers are now involved in the investigation.
If you have any information that could help solve the mystery, call the Tyler or Polk County Sheriff's Department.