One of the first questions we ask ourselves when a criminal act occurs is: Did it really happen that way? That is because when investigating a crime, there are many elements to take into account, choosing the victim, the modus operandi and the criminal's signature, the scene of the crime, the alibi, evidence... The analysis of all of these elements will allow us
to get as close as possible to the reality of what happened. Therefore, in this subject we will study in a practical way, with laboratory material and going to real crime scenes, in order to solve and investigate the main criminal events that have marked criminal history in Spain.