Deschutes County District Attorney John Hummel notified local defense attorneys Wednesday his office may need to expand its inquiry to include cases Larsen wasn't assigned to.
has released a list of active and closed cases - more than 500 total - in Deschutes County
that include evidence that was submitted to the lab for analysis by Larsen.
has said that Larsen is suspected of "skimming" illicit substances from samples submitted to the lab.
has said his
office will review all Deschutes County
cases processed by the lab during Larsen's employment with the state police.
As part of that review, his
office will determine for each case whether evidence played a role in its outcome.
In some cases, defendants admit guilt, which is one reason why Hummel's office would not seek retesting of the evidence in those cases, unless the defense attorney in the case objects to that decision.