There are a lot of things to take note of during interviews. There is one essential skill, though, that hiring managers need to hone: how to spot a liar.

According to Inc., research has revealed that one third of all resumes contain false information. If a candidate lies about something on their resume, it is highly likely that they will not be entirely truthful about things when they get the job.

The ability to detect lies comes with observing the other person. The publication gave tips and signs that a person is not telling the truth.

Begin with observing the candidate's baseline behavior. Detectives usually start their interrogation with non-threatening questions such as where the suspect grew up and what their favorite hobbies are.

Afterwards, they up the ante with questions that may prove to be detrimental to their career if answered incorrectly. Questions such as what their weaknesses are and why they left their previous job may prove to be more difficult to answer especially if they weren't honest in their resume.

Fortune shared four interview questions that startup bosses can ask potential employees. If, however, they pause, break eye contact and fidget, among others, it is highly likely that they're nervous.

Inc. noted that breaking eye contact actually helps assuage guilt. They may also look away and glance back at the recruiter to see whether you believe the lie. Holding an interviewer's gaze can be overwhelming for a liar since they still have to think about a lie to tell.

Conflicting gestures are a sign as well. These can be in the form of saying "No" but the head is nodding or saying "Yes" but with a shake of head.

Another thing that hiring managers need to look out for is the "Duping Delight." This refers to the happiness that people experience when they feel that they have successfully manipulated someone else. This micro expression can manifest in a small smile.

Using a lot of words, known as overcompensating language, is also another tell-tale sign that a candidate is lying.