When a prosecutor brings a capital case, which is also called a death penalty case, she must charge one or more "special circumstances" that the jury must find to be true in order to sentence the defendant to death. (http://www.nolo.com/definition.cfm/term/52557AC3-B765-4BEE-B51CE8A9811D2939, para 1) These circumstances should be able to give enough proof that a capital crime is committed by the accused beyond doubt. These "special circumstances" should be able to lead the prosecution to the person who has truly committed the crime.
Circumstantial evidence is just as important as direct evidence. These are evidence of facts from which inferences or presumptions can be drawn. Providing circumstantial evidence from a capital crime aids in the conviction of the right person responsible for the crime committed. Prosecutors are able to create a picture of how the crime may have been committed given the circumstantial evidences. It may even lead them to further investigation of the crime that may lead them to the direct evidences that might give them clues as to the actual crime scene. Circumstantial evidence may at the same time provide the investigators a guide to get the right convict. ...Show more