A man who stole a woman's cellphone and earlier had pretended to be a police officer was arrested at a Westbury hotel on Friday, Nassau police said.

Police said David Nourmand, 32, of 102-50 67th Rd., Forest Hills, Queens, forcibly stole a woman's cellphone outside the Viana Hotel & Spa at 3998 Brush Hollow Rd. in Westbury at 1:30 a.m. Friday and ran away. The hotel manager reviewed video surveillance and identified him as a hotel guest. When Nourmand returned to the hotel at 2:30 p.m. on Friday, the hotel manager called police and they arrested Nourmand, police said.

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A further investigation by detectives showed that shortly before stealing the cellphone early Friday morning, Nourmand used his vehicle to force a taxi cab with customers inside to pull over on WolverHollow Road in Upper Brookville, police said. Nourmand got out, approached the taxi, told the driver he was a police officer, and demanded identification from everyone inside the cab, telling them that "We are looking for a killer."

When the people in the cab asked to see his identification, he ran back to his vehicle and drove away, police said.

Nourmand is charged with third-degree robbery and second-degree criminal impersonation, police said. He is scheduled to be arraigned at First District Court in Hempstead on Saturday.