Mexican police are expanding their search for 43 students after investigators determined that 28 sets of human remains recovered from a mass grave were not those of the missing youths.
Authorities have sent horse-mounted patrols and sniffer dogs into the hills around Iguala, the southern city where the students were last seen on September 26. The search is focusing on a second set of clandestine graves and a third site where another burial pit was found this week.
The digging that continued Wednesday threatens to reveal even greater horrors in the gang-controlled countryside. Each search has turned up more hidden graves, raising the question of how many people have been secretly killed by the area’s drug gangs.
The students from a rural teachers college were last seen in police custody.