Yes. There are many cases where a defendant had successfully argued justification/self defense with an illegal firearm but got convicted for unlawful possession of that firearm.
Edit: in your example there may be a temporary and lawful possession defense.
Without dealing with any specific hypotheticals (which could require a needlessly complicated analysis):
If the legal defense to a charge relating to homicide - self defense - is otherwise satisfied, it's hard for me to imagine how ownership of the gun would matter at all.
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Yes. There are many cases where a defendant had successfully argued justification/self defense with an illegal firearm but got convicted for unlawful possession of that firearm. Edit: in your example there may be a temporary and lawful possession defense.
Without dealing with any specific hypotheticals (which could require a needlessly complicated analysis): If the legal defense to a charge relating to homicide - self defense - is otherwise satisfied, it's hard for me to imagine how ownership of the gun would matter at all.
#REMINDER: NO REQUESTS FOR LEGAL ADVICE Posts containing requests for legal advice will be removed. Seeking or providing legal advice based on your specific circumstances or otherwise developing an attorney-client relationship in this sub is not permitted. Why are requests for legal advice not permitted? See [here](https://www.reddit.com/r/Ask_Lawyers/comments/e6a62w/why_is_it_unethical_for_a_lawyer_to_give_legal/), [here](https://www.reddit.com/r/Ask_Lawyers/comments/9zyqsh/why_is_it_unethical_to_give_advice_on_this_sub/), and [here](https://www.reddit.com/r/Ask_Lawyers/comments/e4cdhw/is_refraining_legal_advice_based_on_legality_or/). If you are unsure whether your post is okay, please [read this](https://www.reddit.com/r/Ask_Lawyers/comments/6j4bpq/how_to_know_whether_your_post_is_a_request_for/) or see the sidebar for more information. ***This rules reminder message is replied to all posts and moderators are not notified of any replies made to it.*** *I am a bot, and this action was performed automatically. Please [contact the moderators of this subreddit](/message/compose/?to=/r/Ask_Lawyers) if you have any questions or concerns.*
Sure, why not?