What do confessions typically contain that is crucial for investigations?

Confessions play a critical role in investigations primarily because they often contain facts that only the suspect would know about the crime. This unique knowledge can validate the suspect's involvement and help corroborate evidence gathered through other means. For instance, if a confession reveals specific details about the crime scene, the method of committing the crime, or the circumstances surrounding the event that have not been made public or are known only to law enforcement, it serves as a strong indicator of the suspect's guilt.

The presence of such specific information in a confession adds significant value to the investigation, as it can not only confirm the suspect's involvement but also assist in building a case against them. This is in stark contrast with hearsay, general observations, or statements from witnesses, which may not provide direct evidence of the suspect’s guilt or specific knowledge about the crime. These other forms of information could be less reliable or relevant in establishing a suspect's culpability or in understanding the crime in question.