The father of a man who went missing at the beginning of this week is looking for answers about what happened to his son, and where he is now. He's offering a large cash reward for information leading to the location of his son.

Before work on Monday, 22-year-old Ft. Wainwright solider Mason Heimer stopped for breakfast at McDonald's. Bank records show he used his debit card for the purchase. But since then, no one has seen him.

Alaska State Troopers have launched an investigation, and Military Police is taking the lead to work together and locate Mason. His car, a gray Ram 1500 Dodge pickup truck bearing the license plate JFY485, is also missing.

Mason's father, Doug Heimer, took to Facebook this week after he flew up to Alaska from Texas to look for his son. In an online posting, he said there is a $10,000 reward for "any information leading to Mason or his vehicle."

Doug said that, since Mason bought breakfast on Sept. 17, he's essentially been off the grid. "No cell phone pings, no FB or YouTube use. No bank activity. Nothing," Doug wrote.

According to Doug, this behavior is very unlike Mason. He said it's not like his son to disappear this way, and by all indications, he was on his way to work after he stopped for breakfast.

Troopers described Mason as 5’9” tall, weighs about 170 pounds, and has blond hair and green eyes. They asked anyone with information about Mason Heimer or his whereabouts to call AST at 451-5100.

Doug said he can also be contacted at 210-872-6907. He says he will remain in Fairbanks until his son is found.