First-degree sexual assault is a serious crime that involves sexual penetration without the consent of the victim. The exact definition of first-degree sexual assault may vary depending on the state or country, but it typically involves one or more of the following elements:

• Sexual penetration occurred
• The victim was under the age of 13
• The victim was between the ages of 13 and 18 and one of the following:
  • The perpetrator was in a position of authority over the victim
  • The victim was physically helpless or mentally incapacitated
  • The victim was threatened with serious bodily harm or death
  • The victim suffered serious bodily injury during the assault

First-degree sexual assault is considered the most severe type of sexual assault and is typically punished more severely than other degrees of sexual assault. The exact punishment for first-degree sexual assault may vary depending on the jurisdiction, but it is typically a felony offense that can result in a lengthy prison sentence.