La Marque crash: Fleeing motorcyclist killed after crashing into vehicle during Galveston police pursuit

All northbound lanes of Interstate 45 near FM 519 in La Marque have reopened after being closed overnight due to a police chase that turned deadly. 

That's after police say a fleeing motorcyclist slammed into the back of a vehicle during a police pursuit. 

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According to Galveston County Sheriff Henry Trochesset, the chase began around 12:40 a.m. when a woman fell off the back of a motorcycle in the 4100 block of Seawall Boulevard. 

Witnesses said the motorcyclist left the injured woman behind and sped off. 

Not long after, authorities said they spotted the motorcycle and tried to stop it. 

Instead, the motorcycle rider sped off at speeds exceeding 100 miles per hour. 

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The pursuit with Galveston Police traveled north over the Mitchell Causeway before the motorcyclist crashed into the back of a tow truck that was hauling a disabled car around 1:10 a.m. 

Following the crash, authorities said the motorcycle and rider slid into a Toyota Tundra that was headed northbound. 

The rider was pronounced dead on the scene. 

Authorities said the woman who was left behind by the motorcycle rider was listed in critical condition at the Level 1 Trauma Center at the UTMB Health Emergency Center at John Sealy Hospital. 

The relationship between the motorcycle rider and the woman has not yet been confirmed.