Robledo's 11-year-old daughter, Sophia Ceballos, in an interview with CBS, recounted her reaction when the attendant ordered that the dog carrier case be placed in the overhead bin.
"My mom was crying".
In a separate incident, the Swindle family was supposed to be flying their dog, Irgo, from OR to Kansas City on a United flight Tuesday.
Kara and Joseph Swindle, along with their children and 10-year-old German Shepherd Irgo, were moving to Kansas from the West Coast.
The dog flew from OR to Denver, where he spent the night.
Swindle said Irgo - who was flying for the first time - had no water or food on the 16-plus hours flight to Japan.
The family that owned the dog and other passengers contradicted the airline's account, saying the dog's barks were audible from inside the bin. "We apologize for this mistake and are following up with the vendor kennel where they were kept overnight to understand what happened".
People for the Ethical Treatment of Animals issued a statement calling for the flight attendant to be fired and charged with cruelty to animals. "We have notified our customers that their pets have arrived safely and will arrange to return the pets to them as soon as possible". "We assume full responsibility for this tragedy and express our deepest condolences to the family and are committed to supporting them".
It is rare that an animal dies on a plane.
Calling the most recent incident "disgraceful", Kennedy noted that United accounted for the majority of animal deaths on flights among U.S. carriers and vowed to push for a legislative fix.
The airline's animal troubles compound a public relations nightmare tracing back to last spring when a man was dragged from his seat and down the aisle of a parked United plane in order to make room for an airline employee. "For comparison, Delta and American each reported two animal deaths".
The Associated Press sent an email seeing comment Thursday on the criminal investigation to an airline spokesman.
"Your pet is treated as cargo", Greenberg said.
According to social media posts from June Lara and Maggie Gremminger, two passengers on the flight, a United Airlines flight attendant insisted to the family that Kokito needed to be stored in the overhead bin of the plane.