how to detect lies

For the past weeks I've been experiencing a lot of stories from close people about certain people lying to them and them having troubles proving the lies or knowing if the person is actually lying so to shed a bit of light for them I kinda had the itch to browse online for this "how to detect lies here are some example's from the site

Body Language of Lies:
• Physical expression will be limited and stiff, with few arm and hand movements. Hand, arm and leg movement are toward their own body the liar takes up less space.

• A person who is lying to you will avoid making eye contact.

• Hands touching their face, throat & mouth. Touching or scratching the nose or behind their ear. Not likely to touch his chest/heart with an open hand.

Interactions and Reactions
• A guilty person gets defensive. An innocent person will often go on the offensive.

• A liar is uncomfortable facing his questioner/accuser and may turn his head or body away.

• A liar might unconsciously place objects (book, coffee cup, etc.) between themselves and you.

I got the information from this site http://www.blifaloo.com/info/lies.php soif ever you want to train yourselves in the art of catching liars better read up on this hahaha (I am so EVIL!)