A Westchester County man is facing murder charges for allegedly beating his 32-year-old ex to death inside a local motel room and fleeing with the couple’s 2-year-old son.

Justin Bartley, 32, is now being held without bail after the cleaning staff found the battered body of Roseberline Philippe in Room 230 at the Days Inn motel in Elmsford Sunday, lohud.com reported .

Records show Bartley has an open drunk driving and weapons possession case from May pending in White Plains — and the outlet said he was on probation for a gun conviction in Rockland County.

“She was so sweet and always laughing even if she was dealing with stuff,” the slain woman’s sister, Yvena Philippe, told lohud Tuesday. “She was a giver and he took advantage of her in that way.”

She said Bartley and her sister — a

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