A Tuesday morning drug bust has netted multiple pounds of methamphetamine, and led to the arrest of 39 year-old Carlos Perez-Romero.

Perez-Romero was stopped by a Mesa County Sheriff's Deputy after he exited I-70 in Mack and was observed traveling on the shoulder for about 100 feet before fully entering his lane.

According to the arrest affidavit, Perez-Romero was extremely nervous when pulled over.  His hands trembled and he stuttered as he spoke.

Perez-Romero told law enforcement he drove to California days earlier to sell a horse.  He said the transmission on that truck had died and he was borrowing his brother's truck and now headed back to a ranch in Mack.

When additional Drug Task Force officers arrived, Perez-Romero was informed he would not receive a ticket and his documents were returned to him. 

At that point, law enforcement officers asked Perez-Romero if he was carrying any illegal drugs, weapons, or large amounts of cash, to which he replied no.

Perez-Romero agreed to a thorough search of the vehicle and trailer.

Officers say they noticed in the back of the trailer that there was undisturbed dust and horse manure, suggesting to law enforcement that the horse had not been transported as recently as Perez-Romero had indicated.

One area near the back of the trailer, however, did appear disturbed to officers.  A K-9 was brought in to examine the area.

The dog indicated to the odor of drugs coming from that same area, as well as several others around the vehicle.

During a further search, law enforcement found a black plastic bag with two cylindrical packages.

Officers tested the substances inside the cylindrical packages.  Those substances tested "presumptive positive" for meth.

The total amount, law enforcement says, was approximately two pounds.

Perez-Romero was arrested and is charged with unlawful distribution, manufacturing, sale, or possession of illegal drugs, a class 3 felony, being a special offender, a class 2 felony, and failure to drive in a single lane.