The investigation into the death of a 1-year-old Richland boy has been completed and the police report is being reviewed by Benton County prosecutors.
Richland police Capt. Mike Cobb said investigators have received most of the information they were waiting on from medical experts about Ryder Morrison's death.
A couple of supplemental items still are outstanding, but everything else has been forwarded to prosecutors, who will determine if any of the facts support a criminal charge, Cobb said.
"There's quite a volume of information to review," he said. "It's a complex situation."
No arrests have been made.
Ryder died in surgery after suffering a head injury at his home June 22.
The boy, who celebrated his first birthday the day before his death, died from abusive head trauma and had injuries to other areas of his body, Benton County Coroner John Hansens said last month.
Hansens ruled Ryder's death a homicide.
No information has been released about who was with Ryder when he was hurt or how he suffered the head injury.
Ryder lived with his mother, Tawney Johnson, in the 1300 block of Williams Boulevard. His family previously said the boy was being watched by a nanny at the time, and his mother was not home.