A New Hampshire State Police trooper deliberately placed his fully-marked patrol cruiser into the path of a wrong-way driver on Route 101 in Exeter just before 2 a.m. Sunday, absorbing a head-on crash to keep the impaired driver from continuing down a corridor full of westbound traffic. According to CBS Boston, Trooper Shane McClure walked away from the collision without serious injuries, as did the wrong-way driver and her passenger, but the incident escalated within minutes into a felony-level case now headed to Brentwood District Court.

For New Hampshire drivers who have grown accustomed to grim wrong-way headlines out of southern New England, the Route 101 incident is a rare result. The trooper went home. The driver and passenger are alive. The vehicles took the damage. And the underlying decision to put a cruiser in the lane, knowing what was coming, is the reason any of those outcomes are possible.

What Happened Just Before 2 A.M.

According to the CBS Boston report, multiple 911 callers flagged a 2019 Nissan Kicks driving east in the westbound lanes of Route 101, one of the state’s busiest east-west corridors connecting the Seacoast to Manchester. The vehicle had already passed multiple other drivers traveling in the correct direction by the time Trooper McClure encountered it between Exits 8 and 9 in Exeter.

State police said McClure was westbound when he came upon the Nissan and made the decision in seconds. “Knowing that he had passed multiple other vehicles while searching for the wrong-way driver, he knew that there were many other innocent drivers in danger,” the agency said in a statement quoted by CBS Boston. “Trooper McClure then placed his fully-marked State Police patrol cruiser in the path of the wrong-way driver in an effort to end the possibility of tragedy to anyone else.”

The Nissan struck the cruiser head-on. CBS Boston reported that McClure, the driver, and the passenger were all evaluated on scene and found to have no serious injuries, an outcome that would have been highly unlikely had the wrong-way driver continued into oncoming traffic at highway speed.

The Charges Filed Sunday Morning

State police identified the driver of the Nissan as 21-year-old Cassandra Aldecoa of Dover. According to CBS Boston, Aldecoa was arrested on felony counts of reckless conduct, second-degree assault, and criminal mischief, along with misdemeanor aggravated driving under the influence and driving under the influence. Each of those charges carries different exposure under New Hampshire law, with the second-degree assault count, codified at RSA 631:2, opening the door to a Class B felony conviction that can carry a sentence of up to seven years if a jury finds that bodily injury was caused under reckless or extremely reckless circumstances.

Her passenger, 21-year-old Zachary Lapierre of Lebanon, Maine, was also taken into custody. CBS Boston reported that Lapierre faces misdemeanor charges of disorderly conduct, contempt, and violating conditions of release, the last of which suggests prior court orders were in effect at the time of Sunday’s incident. Both Aldecoa and Lapierre were held on preventative detention overnight and scheduled to appear in Brentwood District Court on Monday.

The aggravated DUI charge against Aldecoa is particularly significant. Under New Hampshire’s aggravated DUI statute, RSA 265-A:3, the charge can be elevated when a driver is operating with a substantially elevated blood alcohol content, with a child in the vehicle, at excessive speed, in connection with a crash causing serious bodily injury, or while attempting to elude law enforcement. State police have not yet released the basis for the aggravation, but the wrong-way component alone is consistent with the kinds of fact patterns prosecutors typically bring under that statute.

A Tactic That Is Not In Any Manual

What Trooper McClure did on Sunday morning is sometimes called a “rolling roadblock” in the policing literature, but most agencies do not formally train for the maneuver of stopping a wrong-way driver with a patrol vehicle. The reason is straightforward. Putting a cruiser in front of an oncoming car at highway speed exposes the officer to extreme risk, including head injuries, lower-body injuries, and the potential for vehicle fires. Patrol vehicles are not engineered for symmetric head-on collisions, and the airbag systems that protect occupants in standard front-impact crashes do not always perform as designed when the closing speed comes from another moving vehicle.

The calculus on Route 101 was that the alternative was worse. McClure had already passed multiple westbound vehicles in the moments before he found the Nissan, meaning the wrong-way driver had been traveling east in the westbound lanes long enough to create what state police described as a developing emergency for “innocent drivers” in the corridor. The judgment that stopping the Nissan with a cruiser was the lower-risk option, rather than letting it continue until it struck a civilian vehicle, is the kind of decision that gets second-guessed in command reviews but, in cases like this one, often gets praised by the same reviewers when no one dies.

The Larger Wrong-Way Driving Problem

The Exeter case lands in the middle of a national stretch of bad wrong-way driving outcomes. CBS Boston noted that the Route 101 incident followed the May 6 death of Massachusetts State Police Trooper Kevin Trainor, who was killed in Lynnfield while trying to stop a wrong-way driver. The wrong-way driver in that case was also killed. Other recent incidents around the country, including a deadly wrong-way crash on I-25 in Denver and a fatal I-88 crash near Chicago, have kept the issue in the national news cycle.

Wrong-way driving collisions are a statistically small slice of total highway crashes, but they are disproportionately fatal, a reality that ran through the conversation around the fatal Route 12 school bus crash in Marlborough earlier this spring as well. National Highway Traffic Safety Administration analyses have repeatedly shown that wrong-way crashes are between 12 and 27 times more likely to be fatal than other types of crashes, with alcohol involvement a factor in the majority of fatal cases. New Hampshire DOT has installed enhanced “Wrong Way” signage and embedded reflective markers at high-risk Route 101 interchanges over the past several years, with the Exeter exits among those upgraded. The geometry of those exits has been a recurring subject in agency safety reviews.

Where The Case Goes From Here

Aldecoa’s case will progress through Brentwood District Court, but the felony counts are likely to be bound over to Rockingham County Superior Court if the state proceeds on the indictment path. The reckless conduct and second-degree assault counts both carry potential state prison sentences. The criminal mischief charge, which covers damage to the cruiser, is calibrated to the value of the property damaged, with felony exposure attaching when damages exceed $1,500. A fully-marked State Police cruiser involved in a head-on collision will easily clear that threshold even before fitment, computer equipment, and emergency lighting replacement costs are added in.

Lapierre’s case is more limited in scope at the misdemeanor level, but the “violating conditions of release” count will pull the file of whatever prior matter triggered those conditions, which will become part of the proceeding in Brentwood. New Hampshire courts treat bail violations with increasing seriousness when they are connected to fresh criminal conduct, and the optics of being a passenger in a wrong-way DUI crash with a state trooper are not the optics that lead to leniency.

For Trooper McClure, who according to the agency was evaluated and cleared of serious injury, the procedural path is more administrative. State police vehicle-involved incidents trigger a mandatory internal review, which will look at the decision-making chain that put the cruiser in the lane, the dispatch chronology, and any improvements that can be incorporated into future trooper training. Reviews of this kind in New Hampshire have, in the past, fed into refresher curricula at the State Police Academy on high-risk traffic stops and pursuit termination tactics.

This is a similar fact pattern, and similar trooper-discretion question, that the state has been grappling with in other recent New Hampshire State Police use-of-vehicle and use-of-force cases, where individual judgment calls in chaotic moments have driven the subsequent legal and political conversation. In Exeter on Sunday morning, the judgment call ended with everyone alive. That is the part that will most stand out when the after-action gets written.

Frequently Asked Questions

Where on Route 101 did the wrong-way crash happen?

The collision occurred between Exits 8 and 9 in Exeter, on Route 101, just before 2 a.m. on Sunday, May 17, 2026. New Hampshire State Police said multiple 911 callers had reported the wrong-way Nissan Kicks driving east in the westbound lanes before Trooper Shane McClure encountered it.

Was Trooper Shane McClure injured?

According to CBS Boston, Trooper McClure, driver Cassandra Aldecoa, and passenger Zachary Lapierre were all evaluated after the collision and found to have no serious injuries. The cruiser absorbed the head-on impact when McClure deliberately placed it in the path of the wrong-way vehicle.

What charges does Cassandra Aldecoa face?

Aldecoa, 21, of Dover, was arrested on felony counts of reckless conduct, second-degree assault, and criminal mischief, along with misdemeanor aggravated driving under the influence and driving under the influence. She was held on preventative detention and scheduled to appear in Brentwood District Court on Monday.

What is "aggravated DUI" under New Hampshire law?

Aggravated DUI under RSA 265-A:3 elevates a standard DUI charge when factors such as a substantially elevated blood alcohol content, presence of a minor passenger, excessive speed, an associated crash causing serious bodily injury, or attempting to elude law enforcement are present. The charge carries enhanced penalties including mandatory jail time on conviction.

How dangerous are wrong-way driving crashes?

National Highway Traffic Safety Administration data consistently show that wrong-way crashes are between 12 and 27 times more likely to be fatal than other types of motor vehicle crashes, with alcohol or impairment a factor in the majority of fatal cases. New Hampshire DOT has installed enhanced "Wrong Way" signage and reflective markers at higher-risk interchanges, including those on Route 101 in Exeter.

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