A Georgia father of three has mysteriously vanished in a case police say contains “a lot of red flags.”

Roderick Crawford, a 46-year-old truck driver, was last seen Friday leaving his home in Barnesville to check a work schedule at a flour mill a few miles away.

“We would anticipate foul play, we don’t know from whom or what, but we are definitely concerned he hasn’t shown back up yet or contacted anyone," Lamar County Sheriff Brad White told Fox News on Wednesday.

White added that five agencies are involved in the investigation, including three district attorney's offices and the Georgia Bureau of Investigation.

Gloria Baker, a family member, told FOX5 Atlanta that when Crawford left his home on Friday, he said to his three boys that "'I’m gonna be right back. I’m going to check the work schedule’."

Crawford has not been heard from since, and his SUV was found abandoned Tuesday in nearby Clayton County.

Investigators say shortly before his disappearance, Crawford called his wife as she got out of work, as he usually has done. His cell phone is reported to have last pinged a tower 15 miles away from his home – and well beyond his intended destination.

“He usually calls her because she has a long commute back home,” Baker told Fox 5 Atlanta. “She said she had missed it. She got off at 7:20. He called at 7:19 and no more phone calls.”

White says Crawford’s SUV is currently being processed by state officials.

"He always stays in contact with his close friends and family," White told FOX5 Atlanta in a separate interview with the station. "There’s a lot of red flags in this case."