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Martha carefully picked the day she started her incarceration, leveraging technicalities, and got out 4 days early.
Lori left it to chance and ended up spending an extra 3 days in prison. If she had reported to prison 1 day earlier (Oct 29), she would have gotten out 4 days earlier (Dec 24), and been home for Christmas.
If you are facing sentencing, be smart... Figure out the best day to report to prison.