Even sites that were contaminated got their attention. They refused to give up. The Americans made few mistakes. The Mexicans made many mistakes. At times it seemed as though they were trying to obstruct justice. They contaminated scenes and slowed down the process. They refused to cooperate in the interests of getting to the bottom of the case. Indeed, they did little investigating on their own. Most of the time they followed the Americans around trying to prevent them from finding new evidence. There was a serious air of complicity in their actions.
The Americans had a hard time because they werent in their own country and had to obey the Mexican law enforcement agents. That made their situation especially difficult. Under normal circumstances, the rule of law would have applied, and it would have been much easier to do their investigation in a timely and methodical fashion. In the United States those who obstruct the investigation of law enforcement agents face a criminal complaint.
Unfortunately this case occurred before many modern methods of investigation were available. DNA profiling would have been useful. The best method of collecting a sample is through a “buccal swab.” Sometimes this requires a court order and police can’t get it. In these cases, other methods can be used including taking samples of blood, saliva, semen, or other fluid or tissue from personal items (for example, toothbrush, razor, etc) or stored samples. Sometimes, samples taken from blood relatives may be used to catch bad guys. So far these methods have proven to be very successful. These processes could have been done on the bodies and the residence and the