DENVER (CBS4)– Denver Police Officer Jacob Marsh was detained earlier this month on a vehicle attack investigation into a head-on collision. The incident under investigation occurred on April 13 when Marsh, 40, was driving an unmarked Denver Police Department vehicle.

Jacob Marsh (Image credit: Denver Police)

It started just after 3 a.m. when Marsh was traveling south (the wrong way) on No. 1 on the 4800 block of N. Quebec Street, north on the 4800 block, according to Denver Police. Another vehicle drove in front of Marsh and was heading south on Lane 2 in the same area, also in the wrong direction.

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This vehicle was able to avoid a collision with another Denver police vehicle traveling in the right direction in the southbound lanes. However, the police vehicle driven by Marsh could not avoid a collision and crashed head-on with the other police vehicle.

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According to the Airbag Restraint Control Module salvaged from the police vehicle, Marsh was traveling 75 mph in a 45 mph zone just 5 seconds before the collision. At the time of impact, the module shows Marsh traveling 51 miles per hour. The driver of the other police vehicle sustained a serious bodily harm described as a proximal tibial fracture of the right leg that required surgery.

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It is unclear whether the other wrong-way driver was arrested or whether this incident was due to a police action. The name of the other seriously injured driver was not identified.