Woman hires hitman to kill her husband

Ok So watching Nancy Grace last night. Woman pays hitman (who is really undercover cop) to kill her husband. Before she hired hitman, she tries to kill him by putting antifreeze in his starbucks coffee. They announce on TV that using 4 ounces of antifreeze in a drink will kill a person. Seriously!! Probably not a good idea to publically announce that on TV where you have so many crazies watching