At the hospital, the male babysitter told staff he was not the baby's father and had no information about his parents.
Staff then cared for the infant until the next morning Grieninger called to say his baby had been handed in the night before.
A woman, believed to be Bridge, called police the following morning to report the baby missing.
Police were told conflicting stories of how the baby came to end up at hospital.
Grieninger and Bridge have since been charged – Grieninger over a probation violation, and Bridge in connection to a stolen car said to have been used to take the baby to hospital.