Prosecutors have portrayed Timothy Jones Jr. as an evil man who, after killing one child, decided the rest of his kids should die as well instead of ending up with their mother.
Missing mother of five Jennifer Dulos had fears that her estranged husband, Fotis Dulos, would run off to a ski resort where Michelle Troconis had connections.
Allissa Martin started recording on her phone during the argument with her husband, Bradley Jenkins, and the resulting audio captured the moment she fell, according to police.
Arrest warrants said items with Jennifer Dulos' blood, including kitchen sponges, were found at various locations in Hartford in garbage bags police believe were dumped by Fotis Dulos and Michelle Troconis.
Suspect Derion Vence allegedly confessed to a community activist to killing the girl and dumping her body hundreds of miles away from her Houston-area home.