Lethal Vows

Lethal Vows is an American dramathriller television movie, based on a true story of Richard K Overton, his exwife Dorothy Boyer, and Overtons third and latewife Janet Overton. Starring John Ritter, Marg Helgenberger and Megan Gallagher. The movie premiered October 13, 1999, on CBS.

However, justweeks later, Lorraine drops dead at home in front of Graham and is then quickly cremated by David. The pathologist initially isnt able to find any signs of foul play except the faint smell of chlorine when he opened her up during autopsy. Dr Farris has applied for a marriage license and subsequently gets married to a woman he met at his wifes election celebration. This course of action places a great level of suspicion on him. With the help of his exwife the police look into the conditions surrounding Lorraines death and after the examination of Ellen Farris further they find out that she is suffering from kidney failure. He was found guilty of first degree murder and sentenced to life without the possibility of parole. It was also revealed that Lorraine died of cyanide poisoning which he switched to after Mexico to speed up the effects of selenium i.e. death it was initially missed due to a chlorine smell, and it was believed that Dr Farris forced his wife to swallow a water supplement pill shortly before her death to mask the prominent smell of cyanide hence the chlorine smell.The motive behind these acts was jealousy and the desire to get rid of his wife he poisoned his first wife in order to leave her for his second, Lorraine, who he was having an affair with prior to their divorce and who he shared an apartment with under her nose, and he did the same thing to Lorraine, to marry his third wife. ........

Source: Wikipedia