Investigators said Hoffman was baby-sitting 5 1/2-month-old Trevor Nash , of Troy.
Police said that Trevor suffered serious injuries.
According to a Troy police report, Hoffman confessed she became frustrated by the other children in her care, and at herself because she was unable to get Trevor to stop crying.
Now, six months later, the grand jury has returned an indictment against her charging her with child endangering.
Hoffman remains free on $50,000 bond.
If convicted, she could face a maximum of eight years in the state reformatory for woman and a maximum fine of $15,000.