Ha! I don't think the grandmother is saying she was prescribed the meds because of the shoplifting incident.
Awww. OK.
I guess I was thinking that the medication might have something to do with her April 17th court appearance to check in with a county mental health program as part of a three-year probation sentence for a petty theft charge to which she pleaded no contest.
ETA: This report states that she was placed on medication stemming from the above referenced charge. http://www.cnn.com/2009/CRIME/04/15/wrong.huckaby/#cnnSTCVideo
Not sure why I can't get it to link directly but the one entitled "Cantu murder suspect weeps 3:14" is where this is mentioned.