MMMmmm, maybe. In most places you'd have to show that you considered yourself to be in imminent danger of death or grievous injury. The guy with the gun committing Aggravated Robbery is a good indication that you are just that. The "type" of crime doesn't matter per say, so much as were you in immediate danger of death or life-threatening injury. Yes, it does. Crimes Against Persons are more closely tied to Self Defense and Use of Force. Some Property Crimes are also related, but Theft and Robbery are not the same thing at all. Sure, with some crimes risk of death or injury is implied in the event The guy with the gun sort of implies it in this case but I don't think you'd win a case saying a car jacker was going to kill you You don't have to know what he was going to do, only what he was doing that placed you in fear of...and again, the gun and his commission of Aggravated Robbery with you as the victim kind of makes the case... simply because stealing your car is an indication your about to be killed. As I said above, gun pointed in your direction, your probably clear to shoot, otherwise it's going to be a tough case. So, I could just walk up to you with my gun pointed at the ground and say "I'm going to kill you", but unless it's pointed 'in your direction', then you can't defend yourself?
You should better inform yourself. Here are some definitions from the Texas Penal Code (most states are similar)...I'll highlight the parts you might focus on.
(17) "Deadly weapon" means:
(A) a firearm or anything manifestly designed,
made, or adapted for the purpose of inflicting death or serious
bodily injury; or
(B) anything that in the manner of its use or
intended use is capable of causing death or serious bodily injury.
(3) "Deadly force" means force that is intended or
known by the actor to cause, or in the manner of its use or intended
use is capable of causing, death or serious bodily injury.
§ 9.31. SELF-DEFENSE. (a) Except as provided in
Subsection (b),
a person is justified in using force against
another when and to the degree the actor reasonably believes the
force is immediately necessary to protect the actor against the
other's use or attempted use of unlawful force. The actor's belief
that the force was immediately necessary as described by this
subsection is presumed to be reasonable if the actor:
(1) knew or had reason to believe that the person
against whom the force was used:
(A) unlawfully and with force entered, or was
attempting to enter unlawfully and with force, the actor's occupied
habitation, vehicle, or place of business or employment;
(B) unlawfully and with force removed, or was
attempting to remove unlawfully and with force, the actor from the
actor's habitation, vehicle, or place of business or employment; or
(C) was committing or attempting to commit
aggravated kidnapping, murder, sexual assault, aggravated sexual
assault,
robbery, or aggravated robbery;
(2) did not provoke the person against whom the force
was used; and
(3) was not otherwise engaged in criminal activity,
other than a Class C misdemeanor that is a violation of a law or
ordinance regulating traffic at the time the force was used.
(b) The use of force against another is not justified:
(1) in response to verbal provocation alone;
(2) to resist an arrest or search that the actor knows
is being made by a peace officer, or by a person acting in a peace
officer's presence and at his direction, even though the arrest or
search is unlawful, unless the resistance is justified under
Subsection (c);
(3) if the actor consented to the exact force used or
attempted by the other;
(4) if the actor provoked the other's use or attempted
use of unlawful force, unless:
(A) the actor abandons the encounter, or clearly
communicates to the other his intent to do so reasonably believing
he cannot safely abandon the encounter; and
(B) the other nevertheless continues or attempts
to use unlawful force against the actor; or
(5) if the actor sought an explanation from or
discussion with the other person concerning the actor's differences
with the other person while the actor was:
(A) carrying a weapon in violation of Section
46.02; or
(B) possessing or transporting a weapon in
violation of Section 46.05.
(c) The use of force to resist an arrest or search is
justified:
(1) if, before the actor offers any resistance, the
peace officer (or person acting at his direction) uses or attempts
to use greater force than necessary to make the arrest or search;
and
(2) when and to the degree the actor reasonably
believes the force is immediately necessary to protect himself
against the peace officer's (or other person's) use or attempted use
of greater force than necessary.
(d) The use of deadly force is not justified under this
subchapter except as provided in Sections 9.32, 9.33, and 9.34.
(e) A person who has a right to be present at the location
where the force is used, who has not provoked the person against
whom the force is used, and who is not engaged in criminal activity
at the time the force is used is not required to retreat before
using force as described by this section.
(f) For purposes of Subsection (a), in determining whether
an actor described by Subsection (e) reasonably believed that the
use of force was necessary, a finder of fact may not consider
whether the actor failed to retreat.
§ 9.32. DEADLY FORCE IN DEFENSE OF PERSON. (a)
A person
is justified in using deadly force against another:
(1) if the actor would be justified in using force
against the other under Section 9.31; and
(2) when and to the degree the actor reasonably
believes the deadly force is
immediately necessary:
(A) to protect the actor against the other's use
or attempted use of unlawful deadly force; or
(B) to prevent the other's imminent commission of
aggravated kidnapping, murder, sexual assault, aggravated sexual
assault,
robbery, or aggravated robbery.
(b) The actor's belief under Subsection (a)(2) that the
deadly force was immediately necessary as described by that
subdivision is presumed to be reasonable if the actor:
(1) knew or had reason to believe that the person
against whom the deadly force was used:
(A)
unlawfully and with force entered, or was
attempting to enter unlawfully and with force, the actor's occupied
habitation, vehicle, or place of business or employment;
(B) unlawfully and with force removed, or was
attempting to remove unlawfully and with force, the actor from the
actor's habitation, vehicle, or place of business or employment; or
(C) was committing or attempting to commit an
offense described by Subsection (a)(2)(B);
(2) did not provoke the person against whom the force
was used; and
(3) was not otherwise engaged in criminal activity,
other than a Class C misdemeanor that is a violation of a law or
ordinance regulating traffic at the time the force was used.
(c) A person who has a right to be present at the location
where the deadly force is used, who has not provoked the person
against whom the deadly force is used, and who is not engaged in
criminal activity at the time the deadly force is used is not
required to retreat before using deadly force as described by this
section.
(d) For purposes of Subsection (a)(2), in determining
whether an actor described by Subsection (c) reasonably believed
that the use of deadly force was necessary, a finder of fact may not
consider whether the actor failed to retreat.
Acts 1973, 63rd Leg., p. 883, ch. 399, § 1, eff. Jan. 1, 1974.
Amended by Acts 1983, 68th Leg., p. 5316, ch. 977, § 5, eff.
Sept. 1, 1983; Acts 1993, 73rd Leg., ch. 900, § 1.01, eff. Sept.
1, 1994; Acts 1995, 74th Leg., ch. 235, § 1, eff. Sept. 1, 1995.
Amended by:
Acts 2007, 80th Leg., R.S., Ch. 1, § 3, eff. September 1,
2007.
§ 29.02. ROBBERY. (a) A person commits an offense if,
in the course of committing theft as defined in Chapter 31 and with
intent to obtain or maintain control of the property, he:
(1) intentionally, knowingly, or recklessly
causes
bodily injury to another; or
(2) intentionally or knowingly
threatens or places
another in fear of imminent bodily injury or death.
(b) An offense under this section is a felony of the second
degree.
Acts 1973, 63rd Leg., p. 883, ch. 399, § 1, eff. Jan. 1, 1974.
Amended by Acts 1993, 73rd Leg., ch. 900, § 1.01, eff. Sept. 1,
1994.
§ 29.03. AGGRAVATED ROBBERY. (a) A person commits an
offense if he commits robbery as defined in Section 29.02, and he:
(1)
causes serious bodily injury to another;
(2)
uses or exhibits a deadly weapon; or
(3) causes bodily injury to another person or
threatens or places another person in fear of imminent bodily
injury or death, if the other person is:
(A) 65 years of age or older; or
(B) a disabled person.
(b) An offense under this section is a felony of the first
degree.
(c) In this section, "disabled person" means an individual
with a mental, physical, or developmental disability who is
substantially unable to protect himself from harm.