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Criminal couples: The most nefarious unions in history

StarsInsider Logo By Stars Insider of StarsInsider | Slide 1 of 29: They say you shouldn't mix business with pleasure. But for these couples, it's hard to determine which was which.Some shared an intense love for each other, and others simply shared an obsession. Click through the following gallery to learn more about these twisted lovers.You may also like: Attention deficit hyperactivity disorder: how to identify the symptoms of ADHD

Criminal couples: The most nefarious unions in history

They say you shouldn't mix business with pleasure. But for these couples, it's hard to determine which was which.

Some shared an intense love for each other, and others simply shared an obsession. Click through the following gallery to learn more about these twisted lovers.

You may also like: Attention deficit hyperactivity disorder: how to identify the symptoms of ADHD

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