Nicholas Baron James, 35, was arrested in the city of Longmont after he refused a blood test, asserting that his blood was “golden”, according to reports.

Local police said he was spotted swerving on Main Street and that after stopping him they found a knife and prescription painkiller in his car.

When they confronted him he demanded officers phone the US Department of State to confirm his diplomatic immunity.

They took him to Boulder County Jail instead.

Mr James faces various charges including drug possession and driving under the influence.