It is incumbent upon both prosecution and defense attorneys to stay mentally alert during the entire final argument of the People. Prosecutors may find their victories very hollow if convictions are reversed due to improper arguments. Defense attorneys may find extensive trial preparation becomes a waste of time if the defense sits idly by, during the State's final argument, giving the prosecution an opportunity to snatch victory from the jaws of defeat.
Some prosecutors violate the rules inadvertently.
Commenting on the defendant's failure to testify - has been extended to include comments about the defendant's failure to express remorse. Commenting on the defense's failure to present evidence. Comments on defendant's post-arrest silence. Attempting to define reasonable doubt. Discussing the likelihood of pardon, parole, or probation.