COLUMBUS: A 27-year-old central Ohio man has pleaded guilty to killing his then-girlfriendís 3-month-old daughter while baby-sitting the child in 2011.

Robert Robinson is likely to face about 20 years in prison when he is sentenced Feb. 20.

The Columbus Dispatch reports that Robinsonís plea agreement Wednesday had him pleading guilty to one count each of involuntary manslaughter, felonious assault and child endangering in the death of Zyanna Bruton.

Assistant Prosecutor Robert Letson said the childís mother left the baby and her two other children in Robinsonís care on Dec. 30, 2011. Paramedics responding to a 911 call found her dead.

Letson said an autopsy determined that the baby had suffered multiple skull fractures, bleeding in the brain and retinal hemorrhages.

Robinson didnít make a statement in court.