the jury retired to deliberate, but before it returned a verdict, members of the murder victim's family approached the prosecuting attorney about representing them in a civil suit against Andre.  In response to this inquiry, which was the first time such an approach had been made in this case, the prosecutor stated that he was unable to discuss representing them at that time.  Later that same evening, the jury returned a verdict of guilty as charged.  After the verdict had been returned, but before Andre had been sentenced, the prosecutor met with and agreed to represent the family members who had approached him, and on March 4, 1981, he filed a civil suit on their behalf.  On April 6, 1981, Andre appeared in courtand was sentenced to life imprisonment.  This sentence was mandatory for the offense of which Andre was convicted.  La.Rev.Stat.Ann. Sec. 14:30.1.  Andre subsequently filed a notice of appeal.  On October 21, 1981, Andre filed a motion for new trial alleging error in the proceedings below on the ground that the prosecutor had a pecuniary interest in the trial's outcome.  On January 18, 1982, the state trial court denied this motion.  After receiving additional evidence, the court found that the hiring had occurred after the case was submitted to the jury and after the verdict had been returned.  In its view, these facts distinguished Andre's case from the cases that he cited in which the conflicts arose before the prosecution actually took