line now saying tonight? >> reporter: david, royal caribbean refusing to comment on the investigation. both of their ships have continued with their itineraries as planned. tonight, the u.s. embassy in mexico says it has staff at local hospitals to help with the victims and their families. david? >> victor oquendo tonight. victor, thank you. now, to the developing story in houston. the murder mystery, and the amber alert at this hour. the urgent search for a six week old baby girl, chamali flores. her mother was found stabbed to death in their apartment. the fbi joining the search tonight. authorities are asking the public to be on the lookout for a woman who might be trying to pass the baby off as her own. next tonight here, the olympic star this evening, now suing usa gymnastics, accusing the organization of trying to silence her allegations of sex abuse with money. mckayla maroney claims she was repeatedly assaulted by former team doctor larry nassar. she says she will be silent no more. here's abc's linzie janis tonight. >> reporter: tonight, olympic gold medalist mckayla maroney