Alright I got the info through my dad (who is calmer and more sane).
This is basically what he said the teacher told my mom: (this happened last week btw, she got the call today)
"We had a math test and Alex didn't bring a calculator (note: not really a big deal since it is geometry)In the middle of the test, a student got up to ask me a question, and Alex stole his calculator off his desk. the student came up to me and told me that his caculator had dissappeared. I let him borrow one of mine.
Near the end of class, Alex finished his test early. When he got back to his seat after turning in his test, he slid the calculator up to the kid that it belonged to. That's when I realized that he had stolen the calculator. I gave him a dean's referral and he got a 30 minute detention."
What actually happened:
I show up to class with a few minutes left in passing period. True, I forgot my calculator. My friend Andrew is sharpening his pencil, and left his calculator on his desk. I grab it off his desk to see if he would notice if it was gone (common practice, am I right?) He looks around and decides that he lost it. Before I can stop him, he goes up to the teacher and asks to borrow one of his calculators. The teacher lends him one. I think to myself, "well, too late now. I'll give it back to him later. And hey, look at that, a calculator for the test. w00t."
I finish the test early and slide the calculator on the floor up to him (he sits about 2 seats in front of me on the left) he looks down and sees it, then looks at me. I wink at him and he give me a

"ya got me" face. The slide on the floor is kinda loud, so the teacher looks up from the desk and sees the calculator on the floor. He calls me up to his desk and says "did you take Andrew's calculator?" and I'm like "well..." He then writes me a dean's referral

confused: this is where him hating me comes in). I go down to the deans office, and he gives me the minimum requirement for getting a referral - a 30 minute detention.
THAT'S IT!
I swear to god I am not lying. I cannot believe what is happening.
Oh and btw I didn't know that she was selling it when I brought it out into the car.