34000 tainted cases is not "messed up big time". It's deliberate and malicious. And she gets 3-5 years? Bullshit.
34000 over nearly a decade career. It's 9.3 cases per day for 10 years, without weekends, vacations or holidays. And 45 minutes of work per case. Provided she had 7hr working day and a lunch break. And she occasionally testified in courts. How is that even possible?
I had to think about how it could be plausible to anyone, and then I remembered what my late father (a chemistry major who later worked as an industrial engineer) used to tell me about working in chemistry labs. Sometimes you have to sit around and wait while an assay runs, but I suppose an efficient person (who has enough equipment) could run more than one assay at a time, and monitor each result in turn. I have no specialized knowledge about what a normal rate of doing tests would be in a well administered state crime lab.