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CENTER MORICHES, N.Y. — An NYPD transit police officer was charged Friday with murder in the death of his 8-year-old son last week, police sources said.

Michael Valva, 40, and his fiancee, Angela Pollina, 42, were accused of murder in the second degree, a week after the suspicious death that occurred in the family driveway in Center Moriches.

Sources told PIX11 an incident happened in the garage last Friday. Shortly after, a 911 call went out saying an individual needed aid.

The original story was that 8-year-old Thomas Valva, who has mild autism, had fallen in the driveway.

Michael Valva joined the NYPD in 2005 and was assigned to the transit bureau. He has since been suspended, pending the murder case.

The child’s biological mother is a NYC correction officer who lost custody of Thomas and his two brothers two years ago, she said in a Facebook post.