LINDEN, N.J. (CBSNewYork) –  NYPD investigators are looking to test the blood alcohol level of 27-year-old Pedro Abad, the off-duty Linden police officer behind the wheel driving the wrong way Friday with three passengers while on Staten Island’s West Shore Expressway.

Minutes before the horrific crash, surveillance video from a gas station shows the car going the wrong way on a service road leading to the expressway.

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The wreck killed 28-year-old Linden officer Frank Viggiano and a friend, Joe Rodriguez.

Frank C. Viggiano (credit: Linden Police)

Frank C. Viggiano (credit: Linden Police)

Pedro J. Abad, Jr. (credit: Linden Police)

Pedro J. Abad, Jr. (credit: Linden Police)

As CBS2’s Jessica Schneider reported Friday, the three off-duty Linden, New Jersey, cops and their friends spent the early morning hours at a gentleman’s club called Curves near Tottenville.

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The department is now in mourning, Linden Police Captain James Sarnicki told WCBS 880’s Jim Smith.

“Our officers are coping, we do have grief counselors and a police chaplain available,” Sarnicki said.

Sarnicki would not comment on a social media posting by the driver posted hours before the crash showing shots of alcohol.

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Abad and a second officer remain in critical condition.