A Westbury man faces at least four years in prison after admitting he caused a Ronkonkoma car crash in which his teenage son suffered a head injury.

Edward Langley, 34, pleaded guilty Tuesday in Suffolk County Court to second-degree assault, first-degree reckless endangerment, endangering the welfare of a child and other charges after smashing his Volvo into a tree at the corner of Pine and Woodlawn avenues in December.

Judge Martin Efman said he would sentence Langley on Sept. 28 to 4 years in prison and 5 years of probation.

Prosecutors will ask Efman to sentence Langley to 5 years in prison, said Robert Clifford, a spokesman for District Attorney Thomas Spota.

Langley was fleeing a sheriff's deputy when the crash occurred, authorities have said. The deputy had pursued Langley after his ex-girlfriend called 911 and said Langley was following her on the Long Island Expressway, according to the sheriff's office.

Langley's son, Edward Langley III, 14, suffered a serious head wound in the crash. The boy is fully recovered, the elder Langley's attorney, Philip Murphy of Bay Shore, said. Langley fled the deputy because he was driving without a license, Murphy said.

The sheriff's office has said Langley did not stop or slow down when he saw a deputy was pursuing him. The pursuit of Langley lasted about three minutes before the crash, authorities have said.

Langley remains in jail on $100,000 bail.

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