Houston: Sikh police officer shot dead in a cold-blooded way

Citing a review of Dhaliwal's dashcam video, the officials said it appeared to be a routine traffic stop, wherein he conversed with the driver for about two minutes before heading back to his patrol vehicle.

But within a few seconds, the driver stepped out of the car with a gun and "ambushed" the officer, shooting him in the head.

The reason of the attack hasn't been ascertained.

Subsequently, an image of the gunman, obtained from the dashcam, was circulated.

The assailant was eventually found inside a business center, less than a mile away from the scene of crime.

Robert Solis, 47, was taken into custody and charged with capital murder. A weapon believed to be used in the attack was also recovered.

A woman co-passenger was also taken into custody.

Dhaliwal, as fondly remembered by his colleagues, was a 10-year veteran, who is survived by his wife and three children.

In 2015, he became a trailblazer for his community, when the Harris County Sheriff's Office made an official policy, allowing him to wear his beard and turban on duty.

Before becoming a deputy, he was an entrepreneur with a trucking business.