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EL RENO, Okla. – An Arizona man was pulled over October 11 for a traffic violation.

Jorge Vasconcelos, 25, was reportedly swerving and weaving while he was driving.

Deputies were concerned that he was either intoxicated or fatigued, so they pulled him over.

Vasconcelos said he was helping move his girlfriend to Georgia, and he was indeed sleepy.

Deputies suggested that he take a nap before getting back on the road.

Then, out of nowhere, Vasconcelos told authorities he wasn’t a criminal and they could check his truck if they wanted to.

Thinking it was odd to offer that, deputies said they decided there was probably a reason and checking his vehicle wasn’t a bad idea.

“My deputies thought it was really strange that he would just tell them they could search his vehicle out of the blue,” said Randall Edwards, Canadian County sheriff. “So, they thought that might be a good indicator that they should indeed search it.”

During the search, they found a  loaded Bursa .380 caliber pistol in the front passenger seat.

They also noticed that the manifold of the truck’s engine had been tampered with.

A fiber optic scope had been run through a vacuum line to a large metal box inside the engine.

Inside the box, deputies found eight kilos of heroin wrapped in cellophane, carbon paper and aluminum foil.

“This was a very sophisticated hidden compartment, requiring a high degree of engineering in order to conceal over 17 pounds of narcotics worth over $3 million inside a functioning engine, that someone could drive across the country,” Edwards said.

“I’ve been in law enforcement for 31 years, and this is the first time I have ever seen anything like this,” said Undersheriff Chris West.

Vasconcelos was taken into custody and transported to the Canadian County Jail, where he was booked on charges of aggravated trafficking of heroin and possession of a firearm in the commission of a felony.

His bond was set at $102,500, and he remains in custody.