50 year old Richard Bundy, who authorities say has an extensive criminal history, first told authorities the two year old girl had an accident in her pants and collapsed at their home on Dublin Court Sunday afternoon.
But hospital officials told authorities the girl appeared to be the victim of abuse.
Bundy is the girl's grandmother's husband.
Authorities say the woman wasn't home at the time, but the child's seven year old brother was and saw what happened.
The boy ran to a neighbor's house for help.
When authorities got to the house, they found the toddler lying on the floor unresponsive with labored breathing.
Authorities say Bundy initially denied the assault.
Bundy is no stranger to the law. He's actually on probation for a 2005 arson conviction for setting two trailers on fire at the nearby Meadows Mobile Home Park.
Authorities say Bundy threatened the boy and a detective during questioning.
He's charged with felony child endangerment, malicious wounding, felony child abuse and threatening a law enforcement officer.