An old HBO horror movie question?

HBO played this movie some 20+ years ago, so it wouldn't surprise me if this question is not answered about this movie.

The opening scene takes place in a court room. There's a Black female judge sitting on the bench - the camera focuses sharply on her pouring a tall glass of crystal-clear water; she takes a deep drink, and the scene continues, refocusing on the attorney's bickering.

The camera pans to the judge, as she has been repetively clearing her throat (possibly coughing: not certain). The baliff asks if she's okay, would she like some more water, and (in my mind's eye) she looks down, eyes filled with terror, at the partially-filled glass.

She begins to convulse, grasping at her throat, almost as if she can no longer inhale. Suddenly, there is the painfully load scream - a quick pan left to the court room audience: there's a woman standing with her hand over her (still screaming) mouth, pointing at the judge. Another quick pan, then zoom on the judge: there's blood coming out of her eyes, ears, (okay, all noticeable orifices).

The person on the witness stand recoils in horror, as the judge begins to convulse more...suddenly, she stops, but within a split-second of her stopping, her head explodes (no, not Scanners).

The plot of this movie is some disgruntled guy was out targeting judges because he either falsely accused of something, or the justice system did him an injustice. His method of attack was putting some undetectable to the eye chemical in their water. The chemical remained dormant until the water is consumed.

The climax is when a detective (doctor, reporter...not certain) discovers that guy's final assault was to contaminate a large splash fountain in front of the state's Supreme Court building, where (on this particular day) the judges' kids would have been (or were) out playing, but none had actually swallowed any of the water (presumed).

QUESTION: does anyone remember this movie, and if so: its title? For some odd reason, I thought Gene Simmons (KISS) was in it, but I've googled, even IMDbed his movies: none fit...thanks bunches!