Murder 911 News Today : Breaking News, Live Updates & Top Stories | Vimarsana

>> reporter: detectives mcdonald and szalbirak realized they needed to pay danielle dreher another visit. >> we're going back to find out what is your intent? what is your involvement with this? >> coming up -- did someone have a million reasons to commit murder? >> there was a substantial amount of money that she was going to gain if sam turned up dead. >> when "dateline" continues. n'. i think dentists will want to recommend sensodyne rapid relief because it's clinically proven to work in 3 days. which means for patients that they get relief very fast. ♪ lowe's helps you do hosting right w...

>> exactly. it's exactly like that. they were playing spy games. >> reporter: now it was up to mcdonald and szalbirak to find out if all those spy games somehow developed into a conspiracy to commit murder. >> i became very suspicious that she had a part in this homicide. >> reporter: detectives sat down with danielle and recorded interviews with her on three separate occasions. from the very first interview, danielle willingly acknowledged that she and michael had been tracking sam and dianne. >> where did you put the tracking device on the vehicle? >> i put it up under the driver's side rear...

24 hours after sam dreher had been shot, his condition began to deteriorate rapidly. sam's sister, cindy, was there when the family decided to take him off life support. >> i hated it. i thought of him like he was one of my children. i loved him that much. >> were you able to be with sam? were you able to hold his hand and say goodbye? >> i did. >> reporter: what did you say to him? >> i made him a promise that the people responsible for his murder would pay for it. >> reporter: the news of sam's passing hit dianne mcknight hard. >> in my mind i'm still thinking maybe there's still some hope t...

Danielle had a storybook marriage. then one tragic afternoon their world came crashing down destroyed by a series of bullets and a senseless killing. as investigators began to dig, they realized not all was as it seemed. they'd entered a thorny maze of marital betrayal. here's andrea canning with "tangled web." >> sarasota, florida, the perfect backdrop for romance. beautiful beaches for long walks, gorgeous sunsets. and a slow rhythm of a gentle gulf tide. stories of love abound in this city by the sea. but not all have ended happily ever after. like the one that unfolded here back in the sum...

Story book marriage and then one tragic afternoon their world came crashing down destroyed by a senseless killing. as investigators began to dig they realized not all is as it seems. they had entered a thorny maize of marital detrail. >> sarasota, florida, the perfect backdrop for romance. beautiful beaches for long walks or just sunset. stories of love abound in the city by the sea but not all have ended happily ever after like the one that unfolded here in the summer of 2012 when secrets, lies, and infidelity lead to murder. >> 911. >> a man has been shot. >> it's really a twisted love