Whether improper defense closing argument permits a prosecutor to make otherwise improper responsive arguments to the jury.
Holding
No. A prosecutor has no license or right to answer defense misconduct with otherwise improper personal opinions or exhortations, although the defense argument is relevant context in assessing prejudice.
Reasoning
Both advocates must keep jury argument within proper bounds. Prosecutors may argue forcefully from the evidence, but they may not state personal beliefs about guilt or credibility, invoke the prestige of the Government, or pressure jurors to reach a particular result. Defense counsel is likewise forbidden to inject personal beliefs or make unfounded attacks on the prosecutor's integrity.
The prosecutor should have objected to defense counsel's improper accusations and asked the trial judge for a warning or curative instruction. The preferred remedy for an improper defense argument is prompt judicial intervention, not retaliation in kind; two improper arguments do not make either one proper.
The so-called invited-response doctrine is not a doctrine of permission. Its proper function is to put the prosecutor's remarks in their full trial context when deciding whether they unfairly prejudiced the accused. A response that merely attempts to counter an improper attack may make prejudice less likely, but it does not erase the prosecutor's ethical and legal error.