A California State Bar Court appellate panel has upheld a four-year suspension for former Santa Clara County prosecutor Benjamin Field, despite an amicus curiae brief from the California District Attorneys Association warning of a chilling effect on prosecutions.

The Bar review panel found it “inexcusable” and “disturbing” that Field, once a star in South Bay legal circles and considered a viable candidate for a judgeship, concealed evidence and ignored judges’ orders over a 10-year period. The ruling, released late Friday, also affirmed five years of probation.