[CaptainCrunch]

How does a Grand Jury operate

https://www.ohiobar.org/ForPublic/Re...CanUse-86.aspx

Relevant parts

The prosecutor presents the state's case by asking the witness questions. The grand jurors also may ask questions, but neither the actual eyewitness to an alleged crime nor the alleged victim of that crime need to appear as witnesses. The rules that apply in court to exclude most hearsay evidence (evidence provided by someone who did not actually witness the crime) do not apply in the grand jury room. Therefore, a police officer may simply testify as to what eye-witnesses and alleged victims have said.

Further, information obtained by illegal police investigation, unconstitutional surveillance, or by unreliable means, can be heard and relied upon by grand jurors, even though that information would not be admissible if the case proceeded to trial. Finally, even if a prosecutor knows of information which would help show that the accused person is innocent, he is not required to present it to the grand jury. So, while two sides are presented in a trial, it may be that only one side will be presented in a grand jury proceeding.