Caleb was last seen at his mother’s house around 5 pm on Sunday, March 29, 2015. At the time, Caleb’s truck was in need of repair. Therefore, he had borrowed Ricky Dale Howard’s truck, because he was in the shop. According to Caleb’s cell phone records, his phone mysteriously stopped working the last night he was seen, and all of his social media accounts went quiet. Tami (mother) contacted Howard to let him know that Caleb was missing and that the police would be calling for the license plate of the champagne chevy 2500 for the police report. Tami never spoke to Howard, instead she left a message but when Howard returned Tami’s call, she was informed by Howard that his truck was at his place of business.

When authorities went to Howard’s place of business, they found the truck was parked and the keys had been returned in their usual spot

In 2021 Ricky Dale Howard was sentenced to 30 years in Federal Prision as a result of charges related to Caleb Diehl that occurred prior to Diehl disappearing.