Forensic evidence is most often used to: establish the elements of a crime identify a culprit establish associations between offenders, victim, and so on a and b

The answer is: Establish associations between offenders, victim, and so on

The association is created by finding a link that connected every findings on victim's body and the crime scene with potential individual in police database.
Things such as fingerprints, hairs, saliva, and footprints usually could be used as a solid evidence that associate a certain individual with the crime.

Currently, as of february 2016, an american traveling in france would be by the exchange rate. the weakness of the euro and the strength of the us dollar means that items in france cost less to an american than they otherwise would. of course, if this trend reverses and the us dollar weakens and the euro strengthens, such as was happening in early 2008, an american traveling in france would have an adverse experience because items would cost relatively more.