Christina Chadwick and Chad Wisnieski were being held Friday on murder charges in the death of Steven Drouillard. His body was found at the Pasadena complex where they all lived. Recently released autopsy results indicate Steven died of multiple blunt force trauma.
Wisnieski, who cared for the toddler while the boy's mother worked, has denied harming the child.
Pasadena police say both adults were arrested Thursday in League City, where they had moved. Harris County jail records show Chadwick's bond is $250,000. Wisnieski is held on $50,000 bond and faces transfer from Galveston County.
Online jail records don't list attorneys for the pair.