A reporter thrusts a small tape recorder in front of Sandy Stern outside the courthouse, and it is possible to see that there is no tape in it. Although this is a mistake, it may be a mistake by the character holding the tape recorder, not the filmmakers.
When Rusty is working late with Stern's assistant, he gets a phone call from his "uncle", but it's actually Lipranzer calling him. Rusty says, "look Greer, we're working to keep the glass out of evidence". He should have called him "Lip", not "Greer".
When Rusty is dining with his wife and son in the restaurant he asks his son, who is holding a glass of milk, a question. His son answers immediately holding his knife and fork. It also happens the other way round when the son speaks to his father.
When Rusty is discussing the case in Stern's office, there is a small figurine of a deer on the end table holding the lamp. When the camera angle changes to Rusty sitting next to the same table, the figurine is gone.
Sandy and his attorney visit the former DA. Raymond, as his new office. They discuss his upcoming testimony to the grand jury. In reality, this is witness tampering and would never be done by a defense attorney at that stage of a case.
During the trial, the attorneys are allowed to walk up close to the witness that is testifying. In reality, counsel would be behind a lectern or podium and can only approach a witness with permission of the judge.
The goof items below may give away important plot points.
The Medical Examiner testified that there was no medical reason why a woman who had undergone tubal ligation would use a spermicide. When the film was made, the medical community believed that the spermicide in question, Nonoxynol-9, protected against HIV infection, a valid medical reason for its use regardless of a woman's fertility.