Predictable Outcomes: Judges' decisions are generally more predictable than those of a jury, in which emotions or personal biases can sway. If, for example, you're assigned a judge with a record of showing leniency for mitigating circumstances, your attorney might recommend waiving the jury trial.
Typically, a plaintiff will make its demand in the complaint filed at the outset of the case, and a defendant usually will make its demand in an answer to the complaint. If either party asks for a jury, the trial will be by jury.
Demand: A party may demand a jury trial on any issue triable of right by a jury by serving the other parties with a written demand, which must be filed no later than 14 days after the last pleading directed to the issue. This demand must be specific about the issues that the party wants tried by a jury.
Defendants generally trust that a jury will acquit or render a not guilty verdict more often (than a judge). The O.J. trial certainly validated this belief. Both the defendant and the People have the right to a jury trial in misdemeanor and felony trials (California Constitution, Article I, § 16 and Penal Code § 699).
If someone is accused of a crime, they have a right to be tried in front of a jury. A jury is made up of 12 people who are chosen at random to hear the evidence and decide if the accused is guilty or not guilty.
Deferment usually takes a phone call to the circuit clerk or a request on the form some counties ask you to return when you're summoned. If you need a long-term excuse, you must show that jury duty would cause "undue hardship" for you.
Jury demand. (a) A plaintiff desirous of a trial by jury must file a demand therefor with the clerk at the time the action is commenced. A defendant desirous of a trial by jury must file a demand therefor not later than the filing of his or her answer. Otherwise, the party waives a jury.
The failure of a party to serve and file a demand as required by this rule constitutes a waiver by the party of trial by jury. A demand for trial by jury made as herein provided may not be withdrawn without the consent of the parties.
At a defendant's arraignment, if they enter a "not guilty" plea, there will be several pretrial trial proceedings designed to resolve the case. If a plea bargain is not reached, then the case will proceed to trial.