A DRAMATIC TWIST IN THE MANSLAUGHTER CASE AGAINST FORMER WEST VALLEY CITY POLICE OFFICER SHAUN COWLEY.

HIGH-PROFILE LEGAL ANALYST PAUL CASSELL -- FROM THE UNIVERSITY OF UTAH LAW SCHOOL -- HAS REVIEWED THE CASE, AND IS JOINING COWLEY'S DEFENSE TEAM.

HE SAYS CHARGES NEVER SHOULD HAVE BEEN FILED.

BUT SALT LAKE COUNTY DISTRICT ATTORNEY SIM GILL IS NOT SECOND-GUESSING HIS DECISION.

GILL CLAIMS COWLEY'S SHOOTING -- OF A WEST VALLEY CITY DRUG SUSPECT -- WAS NOT JUSTIFIED.

CASSELL HOPES TO HAVE THE CHARGES DISMISSED, BEFORE THE CASE GOES TO TRIAL.