Insight - Mexican probe into possible massacre of 43 students deeply flawed

Relatives carry photos of some of the 43 missing students of the Ayotzinapa teachers' training college during a march to mark the ten-month anniversary of their disappearance, in Mexico City, Mexico, July 26, 2015. REUTERS/Stringer

AYOTZINAPA, Mexico (Reuters) - Mexico's investigation into the abduction and apparent massacre of 43 students last year is plagued with errors and omissions and key parts may need to be redone, a review of the evidence shows.

The government's team lost evidence, did not properly investigate some leads and failed to provide scientific proof to back up its account that the students were abducted and incinerated and their remains dumped in a river, lawyers familiar with the case documents say.