Apparently your little sister had no problem with filling her gas tank with money stolen from the murder victim, nor did she see anything wrong with indulging in the stolen sandwich. For supposedly never hanging out with the wrong crowd as you claim, she certainly felt comfortable doing so that night!
Face the facts .. she is locked up where she belongs. No one cares if you get to see her again, and regardless things WILL never be the same for you or her. Perhaps it's time to stop thinking about yourself and your own criminal woes. Let's think about the VICTIM's family for a moment. THEY are the ones who will never see their son again, and for whom things will never be the same. THEY are the ones who deserve sympathy. NOT YOU.
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