Generally speaking, in the US, the local or state prosecutor decides if an alleged attacker will be charged with a crime. If there is enough evidence, in the mind of a prosecutor, then legal proceedings will begin. In some cases, however, the prosecutor will have a Grand Jury decide to either follow the prosecutor's recommendation, or not to.
the umpire decides if the batsman is out or not
decides whether a media piece is meaningful or not.
the supreme court decides
you
No. Felony crimes are prosecuted by the state, who has the final word on whether, and to what extent, they are prosecuted.
The Senate reviews laws and decides whether they are within the guidelines of the Constitution.
The Judicial Branch decides whether or not a law is unconstitutional.
Whether impeachments are proven or not proven is what decides the outcome of an impeachment.
The American Judicial System, part of the Senate decides which laws are constitutional.
The shape of the follicle
my mom
To determine whether or not the alleged father could be the true father, the blood types of the child, mother, and alleged father are compared.