How did Thirteen get into the Slammer?

HOUSE Mystery: What did Thirteen do?!

http://www.tvline.com/2011/03/house-mystery-what-did-thirteen-do/
By Michael Ausiello

Holy twist, Batman: Turns out when Olivia Wilde’s Huntington’s-afflicted Thirteen tendered her leave of absence last May on House, she wasn’t jetting off to some foreign land to undergo an experimental medical treatment — she was going straight to jail!
The bombshell was dropped into a Fox press release previewing the Fox hit’s April 11 episode:
“Thirteen has been in prison for the past year, but the real mystery for House is what she did to get there. When she exits the prison, she is taken aback to find him waiting for her, and unaware he’s got plans for the two of them for the next few days. As House probes Thirteen for more information about her crime, intent on solving the puzzle of her mysterious incarceration, they travel to an annual spud-gun competition and join forces to compete against House’s much younger, overconfident rival, and along the journey uncover secrets and truths about each other.”
Earlier this year, House creator David Shore hinted to TVLine that Wilde’s comeback would confound expectations. “We have something very cool in mind,” he said. “We’re writing an episode built largely around her return. I know [fans] are speculating about what happened to her during her absence, and I don’t want to rule anything out.”
Getting back to the question posed in the headline, why did Thirteen get tossed in the clink? Sounds like the perfect topic for a poll question!