You make a statement to the police. If you make a statement in court it is subject to cross examination. It is unheard of an accused to make an unchallenged statement in front of a grand jury. Our justice system is one of checks and balances where anyone that gives a statement in court is subject to a rigorous cross examination. In the grand jury proceeding there was nobody to cross examine the police officer because the prosecutors presentation of the case isn't challenged by anyone like it is in a trial. The prosecutor isn't a trier of fact and he isn't a trier of law. A trial has both a trier of fact and trier of law, but a grand jury proceeding has neither.
A grand jury is nothing more than a rubber stamp of what the prosecutor wants that is why many jurisdictions have done away with them entirely. Not to be curt, but you guys simply don't understand the difference between a trial and a grand jury proceeding. They are two very different things, and in this case the grand jury proceeding wasn't conducted in the manner that grand jury proceedings are normally conducted. When you two graduate law school and pass the bar come tell me I am wrong.
A grand jury is nothing more than a rubber stamp of what the prosecutor wants that is why many jurisdictions have done away with them entirely. Not to be curt, but you guys simply don't understand the difference between a trial and a grand jury proceeding. They are two very different things, and in this case the grand jury proceeding wasn't conducted in the manner that grand jury proceedings are normally conducted. When you two graduate law school and pass the bar come tell me I am wrong.