How to spot a really bad guy: men who are manipulative, violent, and otherwise dangerous are adept at hiding those disturbing characteristics. Renowned psychiatrist Keith Ablow explains what kind of behavior gives them away.(REAL-LIFE READS)

When Kathy ** met Brian, she was 31 and recovering from a bad breakup. He was 40, and he too knew something about heartbreak: His wife had not only divorced him but had "poisoned" his two young daughters' minds against him to the point where they refused to speak to him. In spite of their emotional baggage, Kathy and Brian clicked, and four months later, they were engaged.

There was only one problem: Kathy's father. He couldn't get over the fact that she had never met Brian's 8- and 10-year-old daughters, and he insisted it meant Brian had something to hide. A glimmer of doubt entered her mind, which is what prompted her to come to me for psychotherapy.

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