(CNN) -- Tiffany Hartley, who reported that her husband was shot by gunmen in Mexico last month, is moving from Texas to Colorado with a trace of his body yet to be found.
"This is a very difficult day for her. This is her home," Hartley's mother, Cynthia Young, said as a moving van was being packed at the couple's Rio Grande Valley home.
The Hartleys had been planning to move back to their native Colorado before David Hartley went missing on Falcon Lake, which straddles the U.S.-Mexico border.
On September 30, the two decided to ride their personal watercraft to the Mexican side of the lake to see a historical church, Hartley said.
But she said the couple was confronted by three boats, and men -- believed to be linked to a Mexican drug gang -- began shooting at them when they tried to flee. She said she saw her husband shot and attempted to pull him on board her watercraft.
David Hartley's body has not been found, despite extensive searches by both U.S. and Mexican authorities.
Most recently, Mexican authorities suspended their search after the head of the lead investigator in the case was found on the side of the road.
On Tuesday, however, Mexican investigators conducted a re-enactment at the lake, State Department spokeswoman Virginia Staab said.
Young said the move to Colorado does not signal an end to their search for justice.
"We are not giving up. We will continue to call congressmen and lawmakers until they find David, and we will return immediately when they find his body," she said.
Tiffany Hartley agreed.
"Just because I'm going to Colorado doesn't mean I'm done," she said. "You'll still hear from me. I'm still going to be out fighting for my husband and fighting for everyone on the border."
Earlier this week, Hartley pleaded for help in finding her husband.
"I plea to the people who did this. To anybody who knows who did this," she said on CNN's "AC360" on Monday night. "Just give me my husband back. I want to take him home and honor him. And I am sure somebody out there knows. Just help me bring my husband home."
CNN's Eric Fiegel and Nick Valencia contributed to this report.