Why Are Scientists Dressing Pigs in Clothes and Burying Them in Mexico?

First the scientists dress dead swine in clothes, then they dispose of the carcasses. Some they wrap in packing tape, others they chop up. They stuff the animals into plastic bags or wrap them in blankets. They cover them in lime or burn them. Some are buried alone, others in groups. Then they watch. The pigs are playing an unlikely role as proxies for humans in research to help find the staggering number of people who have gone missing in Mexico during decades of drug cartel violence. Families of the missing are usually left to look for their loved ones...