Nassau police arrested a Syosset woman Tuesday night and charged her with Leandra's Law violations after she was seen driving erratically in Westbury with her daughters in the car.

Police said a witness saw Laura Cachell, 32, driving a 2000 Acura near 1085 Old Country Rd. at about 10:40 p.m. "in an erratic manner" and called police. Third Precinct officers responded and found Cachell in front of a Dollar Tree store at 1057 Old Country Rd.

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Cachell, of 108 Colony Lane, was found to be intoxicated and was arrested, police said. Officers found several pills, including oxycodone and carisoprodol, a muscle relaxant, in her bag. Cachell's 9- and 8-year-old daughters were in the car at the time, and were released to their grandfather at the scene, police said.

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Cachell is charged with two counts of Leandra's Law, three counts of seventh-degree criminal possession of a controlled substance, two counts of endangering the welfare of a child, driving while ability impaired/combined influence (alcohol and drugs), driving while intoxicated and driving while ability impaired, police said.

Leandra's Law, named for 11-year-old Leandra Rosado, makes it a felony, even on first offense, to drive drunk with a passenger 15 years of age or younger in the vehicle.

Leandra was killed in a DWI accident in October 2009 when the vehicle she was riding in overturned on the Henry Hudson Parkway in Manhattan.

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Cachell is scheduled to be arraigned in First District Court in Hempstead on Thursday.