Solano County prosecutors said they believed the man was under the influence of a substance that didn't show up in lab results.

A California man was pulled over and a blood test showed he had excessive caffeine in his system. Now, he's fighting that charge.

A California man is facing a charge of driving under the influence, but the only drug found in his system was caffeine.

Last year, a man was pulled over in Solano County, Calif., by an agent with the California Department of Alcoholic Beverage Control for driving erratically.

It's surprising, but true. A California man was arrested for driving under the influence ... of caffeine! And given that millions of Americans consume 3+ cups of coffee per day, it's highly likely ...

A California man was pulled over and a blood test showed he had excessive caffeine in his system. Now, he's fighting that charge.

A California man was pulled over and a blood test showed he had excessive caffeine in his system. Now, he's fighting that charge.

A California man was pulled over and a blood test showed he had excessive caffeine in his system. Now, he's fighting that charge.