Pirone (Armand Assante) is a mob boss being brought to trial by DA Graham (Gabriel Bryne). When the star witness is whacked Graham replaces him with another mob boss. Pirone targets once of the jury, a single mother Valerie (Joanne Whalley-Kilmer) using dirty ex-cop Vesey (William Hurt) to get close to her. Valerie must hang the jury or risk her and her son being killed.
This is a solid mob courtroom thriller with a edge. The story is interesting because you're not sure how Whalley-Kilmer will deal with the situations she is put in - it is quite tense for most of the movie. The actors are all good, Hurt especially plays against type with his shady dirty cop, Bryne does well but Whalley-Kilmer is not that good. Given the demands of the lead character Valerie it may have benefited from a better actress - that said she carries off the innocent single mother role convincingly. All the mob roles are played by actors who you'll see in lots of other gangster flicks including Goodfellas, The Sopranos etc. Some other interesting faces appear - William R. Moses of Perry Mason TVM "fame" appears as a jury, while David Cronenberg has a walk-on part as a film director.
While Whalley-Kilmer doesn't totally convince in Valerie's character change towards the films conclusion the majority of the plot holds together well. If you've seen Demi Moore in "The Juror" then this is similar in plot but "Trial by Jury" is a much stronger film.