No. As a private citizen, you have no actual authority to detain anyone. If they get up and run away, you have no authority to pursue them. Detaining someone after they've put you in a situation which justified the use of lethal force can be a bit iffy. But pulling a firearm on someone for simple trespassing is going to put you in a bad way.
Prosecution will be brought against trespassers.
The correct spelling is trespassers.
Trespassers - album - was created on 2010-02-01.
The sign on the gate read "Trespassers Will Be Shot".
I will detain your bike. Police can not detain my car.
Trespassers - 2006 is rated/received certificates of: Australia:MA
Trespassers - 2011 SUSPENDED was released on: USA: 2011
Jack builds a thicket to keep away trespassers.
I'll detain you no further.
We won't detain you any further. Find a way to detain him until I get there.
You have the right to use lethal force to defend yourself and other people, but not property alone. If you find trespassers on your property you can detain them and order them off your property; however simply shooting a trespasser without warning when they are not threatening anyone is murder.
Detain is the correct spelling.