Four Americans, who were abducted last Friday after armed men shot at their car at an intersection in Matamoros, had gone to Mexico to accompany one of them, Latavia Washington McGee, 33, for cosmetic surgery.
The Americans, traveling with McGee, were Shaeed Woodard, 33; Zindell Brown, 28; and Eric James Williams, 38.
Local Mexican media outlets identified the Mexican woman who was killed as Areli Pablo Servando. She was a 33-year-old employed in a photocopying shop.
Investigators are considering the possibility that the murders may have been a case of mistaken identity.
On Tuesday, four days after the attack, the missing Americans were found by Mexican authorities. Ms. McGee and one other person were alive and sent back to the United States that same day. The other two were dead, and their bodies were returned to U.S. authorities on Thursday.
Criminal gangs in Mexico typically do not target Americans. The group typically operates under the radar. And attacks on Americans create a storm of media and law enforcement attention.
