By Elizabeth Matthews

St. Louis (KSDK) - A St. Louis police detective says we have to change our lifestyles because criminals already have.

Joe Mayberry is also a self-defense instructor at the St. Louis Combat Institute. He says what we've always been taught, the theory of just giving into a gunman and handing over our purse or wallet, may be a thing of the past.

"People aren't considered people anymore, they are objects, objects that can be shot, killed with no remorse it's as easy as turning off a video game," says Mayberry on the mentality of most shooters.

He says when you are faced with a gunman, it's a 50-50 shot.

He says three things you need to remember, be aware of your surroundings, educate yourself and learn how to defend yourself.

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