The body of a 9-year-old boy in Arkansas has been found, CBS News reports.
The boy was found in a heavily wooded area, just one day after the body of his 2-year-old sister was found, the Polk County Sheriff's Office said.
The children's mother and another relative were found dead earlier in the week.
The children, Reilly James Scarbrough and Acelynn Wester, were reported missing on April 22. Acelynn was found in the woods in the same area where her mother, 43-year-old Bethany Jo Wester, was found dead.
Police also discovered the body of Wester's uncle, 66-year-old Steven Payne, inside a home in a neighboring town on Thursday.
Authorities said they found Reilly's body with the assistance of a man who is currently in policy custody on unrelated charges. They expect to charge him with capital murder.
Missing Tennessee Student Found: How a Tip Led to Her Discovery in a Remote California Cabin
Human Remains Found in Missouri Identified as Missing Woman
Missing Girls in DC Spark Outrage and Prompt Calls for Federal Help