It Takes a Killer (2016)

S1E6 Deaths In The Family

After three family members pass away under suspicious circumstances, authorities start to believe they may have been poisoned. Detectives dig up the bodies and discover antifreeze in their systems, raising questions about the identity of the poisoner and their motive. The case takes a dramatic turn when a fourth relative is poisoned but manages to survive, bringing the hidden truth dangerously close to the surface.