Omaha, NE - A man is behind bars tonight accused of causing the death of his girlfriend's 8-month-old boy. Ryan Mullen is at the Douglas County jail. The 27-year-old turned himself in Tuesday morning. He's booked on felony homicide child abuse.
October 18, Chelsea Birtwell rushed her 8-month-old, Payton, to the hospital. The infant was suffering brain injuries. Birtwell told police her son fell out of the stroller. Two days later, Payton died after doctors took him off life support. At the time of death, Mullen and Birtwell were dating and police didn't believe their story.
Mullen hasn't been charged, he will be in court Wednesday. Prosecutors did not say whether they believe anyone else is responsible for the infants death.