According to the link from the timeline, both the police and grandfather refer to this:
“Police say Lyons and Robertson got into an argument Saturday, likely over whether or not Lyons was the father for Amiah. Lyons was arrested over that "domestic dispute", according to Amiah's grandfather Chuck Robertson.
"He physically abused my daughter and it escalated into where he actually ran a car into her," Robertson said. "All I can do it hope. I don't know."”
As for the charges, there are none for DV:
See charges under 3/17 timeline
IN - IN - Amiah Robertson, 8 months, Indianapolis, 15 Mar 2019 #2