I-90 Highway Drug Stops and K-9 Searches: Defending Out-of-State Drivers in South Dakota

Interstate 90 is the primary east-west artery through South Dakota, connecting the Midwest to the Pacific Northwest. Law enforcement agencies view this highway as a major pipeline for drug trafficking. As a result, out-of-state plates-especially from states with legalized marijuana like Colorado, Washington, or California-are heavily profiled. If you were pulled over on I-90 and arrested for drug possession, you are facing serious charges in a strict jurisdiction. To protect your rights and your freedom, you must immediately connect with a criminal defense lawyer from our US Attorneys directory who understands how to challenge unconstitutional highway interdiction tactics.

Pretextual Traffic Stops for Minor Infractions

The Fourth Amendment to the U.S. Constitution protects you from unreasonable searches and seizures. However, police use pretextual stops to bypass these protections. A trooper from the South Dakota Highway Patrol, Pierre or the South Dakota Highway Patrol, Rapid City will pull you over for an extremely minor traffic violation-such as driving two miles over the speed limit, following a semi-truck too closely, or having a slightly obscured license plate under S.D. Codified Laws § 32-5-98. The traffic violation is merely an excuse. The trooper's true goal is to walk up to your window, look for signs of nervousness, and search your vehicle for contraband.

Challenging the Probable Cause of K-9 Drug Sniffs

Once you are pulled over, the trooper may deploy a K-9 unit to sniff the exterior of your car. While the U.S. Supreme Court has ruled that a dog sniff is not a search requiring a warrant, there is a massive catch. Under the federal precedent Rodriguez v. United States, 575 U.S. 348 (US Supreme Court 2015), police cannot prolong a traffic stop beyond the time reasonably required to issue the traffic ticket, just to wait for a K-9 unit to arrive. If the trooper held you on the side of I-90 in Jones County for 40 minutes waiting for a dog, your attorney can file a motion in the Jones County Circuit Court, Murdo to have the entire search declared unconstitutional. If the judge agrees, all evidence found in the car will be thrown out.

Fighting Constructive Possession Charges for Rental Cars

Many drug arrests on I-90 involve rental cars with multiple passengers. If the Highway Patrol finds a backpack full of drugs in the trunk, they will often arrest everyone in the car if no one claims ownership. This is known as constructive possession. To secure a conviction under S.D. Codified Laws § 22-42-5, the state must prove that you had both knowledge of the drugs and the intent to control them. If you were just a passenger in a car rented by a friend, and the drugs were hidden under a seat, a skilled defense attorney will argue that the state cannot prove you had any dominion or control over the illegal substance. Precedents like State v. Barry, 681 N.W.2d 89 (SD Supreme Court 2004) highlight that mere proximity to drugs is not enough for a conviction.

Defending Your Case in Rural County Courts

Arrests on I-90 mean you will likely be prosecuted in rural courthouses along the interstate, such as the Jackson County Circuit Court, Kadoka or the Lyman County Circuit Court, Kennebec. These rural jurisdictions are notoriously strict on out-of-state drug offenders. Having a lawyer who is familiar with the local judges and local state's attorneys is an absolute necessity to negotiate plea deals, such as getting a felony possession charge reduced to a misdemeanor.

Penalties and Costs for Highway Drug Offenses

Depending on the weight and type of drug found, the penalties in South Dakota escalate rapidly.

Frequently Asked Questions (FAQ)