I completely know where you are coming from. The court, upon a child custody evaluators recommendations, to RANDOM hair follicle testing not more than 12 times in a 12 month period. However, when he cried that he couldn't afford the follicle tests (approx $150 a pop), the judge ordered 1 follicle test within the next 6 months. The rest of the yearly testings would be FULL URINE PANEL testings. I got the rotten end of the stick because he is a crack user going back 30 years. Your custody evaluator could request ALL of her medical records, etc. to show pattern. The best advice someone gave me was to keep a log of every visit and it's circumstances and every phone call made to the child and how long it lasted and from what # the call came from. I did this for 2 years before finally going to court and it was a huge plus for my case. How old is your child and do you have an attorney?? I am also in California (L.A. County) and could give you some phone numbers to a lab, etc. I would see if you could have the minutes from your last court date that says the judge ordered a follicle test within 24 hours to have her tested, but it sounds like it to me that she is contempt. If it is crack that she is using, it is a very serious situation. Keep track of every little thing!!! Fight for you child and do whatever you can to keep her contact with your child limited or even supervised. (Mine is supervised for my X!)
For the follicle tests, they have to have at least 1 inch of hair in length and at least a pencil width of hair to test (approx 60 strands). If there isn't enough to test, or she doesn't show, it's deemed a positive test! Good Luck!