Bond is set at $1 million for a Glendale man accused in the death of his infant daughter in 2011.
Phoenix police say specialists in pediatric forensic pathology recently classified the manner of death as a homicide.
They say 28-year-old old James Anthony Sirmans was arrested Tuesday on suspicion of first-degree murder and child abuse.
He didn't have a lawyer at his initial court appearance Wednesday.
Phoenix police received a 911 call on New Year's Eve in 2011 about a 9-month-old girl who wasn't breathing.
Sirmans told police that he put his daughter down for a nap in the second story of his apartment. He returned to check on her 30 minutes later and found her in need of medical attention.
The baby was later pronounced dead at a hospital.