Police say Jacob Bevins admitted to causing the death of his 4-year-old son before the child's remains were discovered in a garbage bag beneath a house (Credit/Fox13).

A father from Washington state was arrested Thursday after allegedly killing his 4-year-old son and burying the child's body underneath his house.

Jacob Bevins, 36, is charged with felony second-degree murder, felony first-degree manslaughter, unlawful disposal of remains and making a false or misleading statement to a public servant, according to a report from affiliate FOX 13 Seattle.

Aberdeen police officers first made contact with Jacob Bevins, 36, on May 12 when his 6-year-old daughter was reported missing, the outlet reported.

Aiden Scott Bevins was found dead after being missing for about a year. (KDFW)

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While police found the girl was safe with her mother, they noticed the other child, Aiden Bevins, 4, appeared to be missing.

Jacob Bevins initially told investigators the boy was with family in another state, but relatives denied having seen the child, FOX 13 reported.

During subsequent questioning, the father admitted to striking the 4-year-old on the head and killing him, local outlet KING 5 reported. He later changed his story, claiming he was chasing his son to the bathroom and he fell and hit his head.

The child's remains were found by authorities underneath the house. (KDFW)

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Remains belonging to the child, who had been missing for about a year, were found May 15 inside a garbage bag underneath the house, according to the outlet.

"My daughter said she saw dirt between the tree and the house," Tammy Pratt, who lives in a nearby duplex, told FOX 13. "I have grandkids that come here and play too. I won’t let them go back there."

Children's toys were seen in a backyard near the scene. (KDFW)

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Officials found the child's injuries resulted from blunt force trauma, inconsistent with the father's story, KING 5 reported.

Both children had previously been in the foster care system before being returned to their biological parents, former foster parents Gary and Magali Lopez told the outlet. They cited concerns about the children's health and safety, noting they contacted Child Protective Services multiple times.

Alexandra Koch is a Fox News Digital journalist who covers breaking news, with a focus on high-impact events that shape national conversation.

She has covered major national crises, including the L.A. wildfires, Potomac and Hudson River aviation disasters, Boulder terror attack, and Texas Hill Country floods.

The hottest stories ripped from the headlines, from crime to courts, legal and scandal.

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