An escape driver at the I-96 motorway in Livonia, Michigan, was arrested thanks to innovative police equipment that is turning the way they are conducted chases in the United States. Come meet Grappler, the new weapon against police escapes!
the device, known as Grappler Police Bumper, was applied by the intervention car and was able to immobilize the car stolen in a controlled manner and without resort to high risk maneuvers.
What is the grappler
Table of Contents
The Grappler Police Bumper is a mechanical system installed in the front bumper of the police vehicles. Its function is to fire a strap or high resistance network towards the rear tire of the vehicle on the run.
As soon as the network holds, it rolls around the wheel promptly, blocking the rotation and forcing the car to stop.
Technical data
The grappler Police Bumper is a device fixed on the front bumper of police vehicles, with "Bull Bar", designed to neutralize fleeing vehicles, through the rear tires and a high resistance network.
The invention was idealized by Leonard Stock, a roof contractor and amateur Arizona welder after being confronted with the violence of road chase in television programs.
Technical Specifications:
- Material and resistance: The network is made of 2 -inch nylon strap with resistance of ≈ 9 070 kg and can be reinforced with duplication for capacity up to ≈ 18 140 kg.
- Network structure: It consists of a "ladder" mesh, with sides of about 1.5 m together by 6 "steps" with a width of 1.32 m.The front step has cushion for better tire grip, especially in rain.
- Anchor and Retraction: The network is linked to the car by a accordion-sewn cable, which extends up to about 9-12 m, being initially compact and that runs controlled as the vehicle slows down.
- Launching mechanism: When pressing a button, two vertical bars are dripped with the aid of gas springs, unfolding l-l channels and projecting the network out of the car.
- weight and Compatibility: The entire device weighs approximately 82 kg, equivalent to the most robust Bull Bulls, and is designed for robust vehicles such as Chevrolet Tahoe and large pick-ups; Adaptations for Dodge Charger have been attempted, but the ability to stop heavier vehicles is limited.
Operating conditions and procedure:
- Ideal intervention speed: Just about 8 km/h (5 mph) of approach to the network to grasp the tire and bread the rear axle,causing a progressive stop of the vehicle.
- Recommended surfacesS: For greater effectiveness, the terrain should be rigid and dry (concrete or asphalt).
- Speed limits for use: between 24 km/he 120 km/h, except in situations that justify the use of lethal force.
- Tactical requirements: Requires a minimum presence of three agents, grappler operator, direct support and coverage vehicle positioned behind the target to hide the driver view device.
Technical advantages in the face of traditional methods
Unlike classic techniques such as barriers with spike strips or PIT maneuver, which imply high collision risk, grappler offers greater control and reduces the potential for collateral damage.
- It allows to be triggered in motion, directly from the police car.
- Block is progressive, reducing the likelihood of rollover.
- Avoid frontal or side impacts between vehicles.
- Maintains the driver and occupants under surveillance to the total stop.
Applications and history of use
Developed by Leonard Stock, Arizona inventor, the system was created after the author observed in television programs the constant risks of road chase. Since then, it has been used in more than 1,500 interventions in 35 US states.
Despite its effectiveness, the device is not yet widely distributed. In the state of Michigan, only the Livonia police have been part of the fleet.
The case in Livonia
The persecution began in Detroit after identifying a stolen vehicle, and extended to Livonia. That's when the agents decided to resort to the grappler, managed to immobilize the car quickly and safely. The driver and two passengers were arrested on the spot.
This was the second episode, in a few weeks, when the department resorted to this technology: in July, it had already been used in a prosperous stop operation.
In Michigan, Livonia police used a grappler device to stop a stolen vehicle on I-96 Thursday morning. The 27-year-old driver from Brighton attempted to escape, ripping the rear from the car. He and two female passengers with warrants were arrested.(WXYZ) pic.twitter.com/8nXFvmJT57
- NTC Feed (@NTC_Feed) August 29, 2025
Future Impact on Road Safety
With the dissemination of the grappler, experts believe it could become a standard solution in high-risk persecution, reducing accidents, protecting agents and civilians and avoiding prolonged escapes on the highway.
the widespread adoption will depend, however, on the investment of each police department and the adaptation of the formation of agents.
