Final answer:
Jeopardy attaches at a non-jury trial when the defendant is first put on trial without a jury, and the judge decides the facts and reaches a verdict. Once jeopardy attaches, the defendant is protected against double jeopardy, but may face another trial if there is a hung jury or a guilty verdict.
Step-by-step explanation:
Jeopardy attaches at a non-jury trial when a defendant is first put on trial and the case is presented to the court without a jury. In this type of trial, the judge is responsible for deciding the facts of the case and reaching a verdict.
Once jeopardy attaches at a non-jury trial, the defendant is protected against double jeopardy, which means they cannot be tried again for the same crime after being found not guilty. This protection is guaranteed by the Fifth Amendment of the United States Constitution.
However, if the non-jury trial results in a hung jury or the defendant is found guilty, they may face another trial for the same crime.