Blowtorch (2016) online

Blowtorch is the story of Ann Willis, a recently widowed and financially struggling, mother of three. When her oldest son, Dave, is murdered, Ann cannot live with the fact that she does not know who killed him. The seasoned NYPD detective assigned to her son's murder case does not give her the attention she wants and the answers come too slowly, she gradually decides to take the investigation into her own hands.