Since Thursday, three people in Columbia, Mo defended themselves from intruders or attackers with one man suffering a deadly bullet wound after trying to break into an apartment.
These cases come just months after a change to Missouri law further defined how much force is legal in self defense in your home.
Some legal experts are saying these may be the first watermark cases on how the changes hold up in court.

There’s no moat surrounding this house, but it's still protected.

"Your home is your castle and you have the right to defend your castle,” says National Rifle Association Member Mark Fringer.

As a member of the NRA, Fringer played a large role in getting the castle doctrine passed in Missouri this July.
This law allows you to shoot and kill an intruder in your house if you feel threatened.

"It makes it a lot easier for a home owner to defend themselves from and intruder,” says Frigner.

Easier, because before this change, home owners had to prove defending themselves with lethal force was a last resort.

"You have a right to protect yourself from serious injury or death and if you remember that and act reasonably, you won't get in trouble,” says Greene County Prosecutor Darrell Moore.
"It shifts laws in favor of people who commit murder to find another way to defend themselves,” says local opinion columnist Roger Ray.

Now, a case in Columbia of a man dying from a gun shot wound Thursday after breaking into an apartment may test how these changes hold up in court.
But, some are worried the changes may lead people to get carried away.

"I have concerns it could cause some people to think they have a license to shoot people and they don't,” says Moore.

Where this case may play out is in civil court, where the changes also made it nearly impossible for family members of an injured or dead attacker to collect damages for the attacker.
NRA members say they will push for more changes this upcoming session in hopes of extending your personal protection area past your home and car to anywhere you're legally allowed to be.