"Him not contacting us... we didn't go for long when he was on trips to check on me or talk to our children."
The Clinton County Sheriff’s Office said Wednesday that searches "have been conducted and are underway in Clinton and Caldwell counties" and that "multiple agencies are involved in the investigation, and multiple leads continue to be researched."
Family members in Wisconsin expressed shock about the brothers' disappearance.
“I can't even believe that something like this can happen. You go on a business trip and you're coming back with the person you met with. They didn't make their flight. They found the abandoned truck on the side of the road with their carry-ons and that was it."
David K. Li
David K. Li is a breaking news reporter for NBC News.