Final answer:
It is impossible to determine how many police officers questioned Bonnie's friends about her disappearance from the ballgame, as no specific information is provided about the involvement of Detective Morrison or other officers in the questioning process.
Step-by-step explanation:
The question 'Including Detective Morrison, how many police officers questioned Bonnie's friends about her disappearance from the ballgame?' does not provide specific information about Detective Morrison or any other officers questioning Bonnie's friends.
Therefore, based on the information provided, it is not possible to determine how many police officers were involved in the questioning.
When answering questions about the investigation of a case, it is essential to have the relevant details and facts to accurately state the number of police officers involved in an interrogation or questioning.
Without such information, an accurate answer cannot be established.