Somebody kept stealing police drugs even after police announced investigation

Back in October, Boston Police announced an investigation into the possible theft of drugs from the department's drug depository in Hyde Park (where the drugs are kept as evidence for trials).

Today, the police announced the thefts apparently are continuing:

As a result of new evidence uncovered, findings suggest that evidence tampering is not solely historical, but also current.

State Police are being brought in, and all personnel who had access to the depository are being reassigned.