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Hollywood often portrays psychopaths as serial killers, but not all psychopaths are that evil. Many exhibit traits to a much lesser degree. In fact, you've likely encountered a few psychopaths, who are actually relatively common in the corporate world.

While about one percent of the general population exhibits psychopathic traits, about three percent of business leaders scored in the psychopathic range in a 2010 study in Behavioral Sciences & the Law. (By comparison, about 15 percent of the U.S. prison population meet the criteria for being psychopaths.)

Before you can spot a psychopath, you have to understand what that really means. Psychopath isn't an actual medical diagnosis. Psychopaths and sociopaths fall under the diagnosis of disorder, which may stem from a variety of genetic and environmental factors. Far more men than women meet the criteria. Symptoms tend to peak during the early 20s and sometimes recede on their own during one's 40s.

Psychopaths aren't always easy to spot, and they're often quite likable—at least initially. But over time, their true nature becomes increasingly apparent.

Here are five things psychopaths do:

1. They're extremely charming.

Psychopaths are almost always well-liked. They come across as delightful people great at making small talk. Their quick wit tends to draw people to them. They usually have interesting stories as well. Their convincing tales portray them in a favorable, yet believable light. People walk away from conversations with a psychopath feeling pretty good.

2. They don't experience remorse.

A lack of might be the first red flag that signals someone might be a psychopath. Psychopaths aren't capable of feeling any genuine remorse. They don't accept any responsibility for hurting other people's feelings. Instead, they blame other people and deny responsibility. A psychopath may say that someone "deserved" to be treated poorly. Or, they may shrug off reports that they offended someone by saying, "She needs to be less sensitive," or "I guess he can't handle the truth."

3. They're really arrogant.

Psychopaths have an inflated sense of importance. Much like narcissists, they think the usual rules don't apply to them. They also tend to have grandiose ideas about their potential. They believe they deserve to be the CEO, or they're convinced they're the best at everything they do.

4. They take big risks.

Psychopaths have little regard for safety, especially other people's. They often lie, cheat, and steal to get ahead. This behavior can be especially toxic. While not all psychopaths engage in illegal activity, those who do plan their crimes well in advance. Their misconduct is usually well-organized, and they leave few clues behind. Psychopaths tend to be very intelligent, which makes them great con artists.

5. They're master manipulators.

They don't experience genuine emotions toward others. But they can mimic other people's emotions, and often they come across as very genuine. As a result, their loved ones often have no idea they're incapable of truly caring for other people.

Psychopaths are really good at manipulating other people's emotions. They flatter others in a subtle yet effective manner, and before long they persuade others to do things they wouldn't normally do. They also use guilt trips or gain sympathy to meet their needs.

This article first appeared on Inc.