The Maine Law on justification can be found here, in title 17-A of the Maine Revised Statutes Annotated (MRSA).
http://janus.state.me.us/legis/statutes/17-A/title17-Ach5sec0.html
In particular, sections 104, 105, 107 and 108 are particularly relevant to civilians.
The basics of the laws of arrest (which must be mastered for a citizen’s arrest) are located here:
http://janus.state.me.us/legis/statutes/17-A/title17-Asec16.html
As you can see, you need to know the elements of any crime for which you might be inclined to arrest. That’s what makes this so difficult.
The definitions within the criminal code are contained here:
http://janus.state.me.us/legis/statutes/17-A/title17-Asec2.html
Finally, to master issues relating to use of force, you will need to learn the elements of Arson, kidnapping, robbery and forcible rape, located:
Arson: http://janus.state.me.us/legis/statutes/17-A/title17-Asec802.html
Kidnapping: http://janus.state.me.us/legis/statutes/17-A/title17-Asec301.html
Robbery: http://janus.state.me.us/legis/statutes/17-A/title17-Asec651.html
Forcible rape (we call it gross sexual assault): http://janus.state.me.us/legis/statutes/17-A/title17-Asec253.html
And: http://janus.state.me.us/legis/statutes/17-A/title17-Asec251.html
"Compulsion" means the use of physical force, a threat to use physical force or a combination thereof that makes a person unable to physically repel the actor or produces in that person a reasonable fear that death, serious bodily injury or kidnapping might be imminently inflicted upon that person or another human being.
http://janus.state.me.us/legis/statutes/15/title15sec393.html
The law regarding concealed firearms permits is located here:
http://janus.state.me.us/legis/statutes/25/title25ch252sec0.html
The statute regarding defense against dog attacks is located here:
http://janus.state.me.us/legis/statutes/7/title7sec3951.html
The fish and game laws are located here:
http://janus.state.me.us/legis/statutes/12/title12ch0sec0.html
There are some 33 statutes within title 12 that regulate the possession, use and transport of firearms, including discharge near structures, possession on certain game preserves and parks, transportation on Sunday, transportation in motor vehicles and possession of a firearm on a paved way.
Moreover, there are regulations issued under the authority of the laws. The regulations must also be obeyed. The Title 12 regulations are contained here:
http://www.maine.gov/sos/cec/rules/09/chaps09.htm
In addition to the laws regarding assault, Pepper Spray and “electronic weapons” are regulated here:
http://janus.state.me.us/legis/statutes/17-A/title17-Asec1002.html
http://janus.state.me.us/legis/statutes/17-A/title17-Asec1004.html
Generally, “electronic weapons” in the hands of civilians are (inartfully) treated as “deadly force”.
Unlawful transfer of firearms and ammunition to minors is regulated here:
http://janus.state.me.us/legis/statutes/17-A/title17-Asec554.html
http://janus.state.me.us/legis/statutes/17-A/title17-Asec554-A.html
http://janus.state.me.us/legis/statutes/17-A/title17-Asec554-B.html
Prohibitions on possession on Public School Grounds and in Courts and Prisons, and bars are here:
http://janus.state.me.us/legis/statutes/17-A/title17-Asec756.html
(defines “contraband” in prisons
http://janus.state.me.us/legis/statutes/20-a/title20-asec6552.html (discharge also)
http://janus.state.me.us/legis/statutes/17-a/title17-asec1057.html (bars, etc.)
http://janus.state.me.us/legis/statutes/17-a/title17-asec1058.html (courthouse)
State preemption of local firearm laws is here:
http://janus.state.me.us/legis/statutes/25/title25ch252-Asec0.html
Federal (
The National Firearms Act, the 1968 Gun Control Act, as well as the laws relating to interstate transportation (Firearm Owners Protection Act of 1986) and possession of weapons on federal property, are contained in title 18 of the United States Code (USC).
That may be found here:
http://www4.law.cornell.edu/uscode/html/uscode18/usc_sup_01_18.html
and here:
http://www.access.gpo.gov/uscode/title18/title18.html
Section 930 of title 18 governs possession of firearms and other weapons on federal property. However, the National Parks have many regulations as well.
Look in chapter 44. The “Firearm Owners Protection Act” can be viewed here:
http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=browse_usc&docid=Cite:+18USC926A
With excellent discussion here
And the regulations are well compiled here:
http://www.atf.gov/pub/fire-explo_pub/2005/p53004/index.htm
with the most useful index here:
http://www.atf.gov/pub/fire-explo_pub/2005/p53004/27cfr_part478.pdf
The postal regulations specific to postal property are here:
http://www.access.gpo.gov/nara/cfr/waisidx_03/39cfr232_03.html