What will happen if i quit my job while i am suspended indefinately pending an investigation?

I recently started working in electronics at wal mart, in fact i am under my 90 days. I was given little to no job training and the only way i learned was by asking, but more commonly doing it wrong and being corrected. this shouldn'e be a problem except for wal mart's crazy strict coaching policy. I have had three "coachings" (been written up, basically) and on the third you are given a paid day off to think about whether or not you wish to continue your employment there. i went in at 2pm and clocked in , found a manager to talk to about my choice to remain with wal mart, and was promptly "supspended pending an investigation i was involved in". My manager said he didn't know what it was about and that it came down the ladder to him from a corporate employee. I have friends who have stolen from wal mart, as have i and on friday evening i was almost caught. BUT! for all legal purposes all they have is that i was in the crapper and so were three opened movies. i didn't actually steal. ??