Final answer:
The parties to the crime in this scenario are George, who threw the briefcase, and Frank, who agreed to pick him up. There are no accessories before or after the fact.
Step-by-step explanation:
In this crime scenario, the parties involved can be identified as follows:
- Principal: George - He is the main actor who committed the crime of throwing the briefcase, unaware that it would cause harm.
- Accomplice: Frank - He agreed to pick George up, knowing that George had just committed a crime.
- Accessory Before the Fact: No one - There is no evidence to suggest that anyone knew about George's intention to commit a crime before it happened.
- Accessory After the Fact: No one - There is no evidence to suggest that anyone assisted or harbored George after the incident.