Potential break in the investigation into the massacre of Nine American women and children in mexico. They were killed monday in sonora, thats near the u. S. Border. Sources tell cbsbs news the victims may have been targeted by a drug cartel. Authorities in mexico announced the arrest of a heavily armed person who may be connected to the case. Were also learning a teenage boy walked 14 miles to get help after hiding his siblings in bushes. Five children were wounded and are now back in the u. S. Recovering. Family members are now mourning the three women and six children killed. Mark strassmann reports from mexico city. This is for the record. Nita and four of my grandchildren are burned and shot up. Reporter this video posted to facebook shows the aftermath of a massacre. The ambushes of three vehicles carrying american women and children. The extended family was attacked by gunmen believed to belong to one of mexicos most brutal cartels. Family members say the bodies of 30yearold mar