Everilda was last seen in Las Vegas, Nevada on July 13, 2006. Her husband, John Matthias Watson III, a retired high school teacher, stated he and his wife separated and she failed to meet him later as they had planned. He stated that she left him of her own accord and moved to Central America, leaving behind a note and her wedding ring, credit cards and keys. Everilda has relatives in Guatemala and was scheduled to visit them a few days after her disappearance, but she did not board her flight and investigators have found no evidence that she left the United States. Her son reported her missing on July 15.

A photograph of John is posted below this case summary. He was arrested the day after her disappearance was reported because he was carrying false identification. John was later charged with Everilda's kidnapping and murder. Investigators believe he lured her to Las Vegas by saying he wished to celebrate her recent birthday there, then murdered her at the Tuscany hotel and dismembered her corpse. John checked into the hotel using a false name and wearing a false moustache and a wig. He is known to have purchased an electric saw, bleach, antifreeze, plastic bags, incense and odor neutralizer on July 13. Authorities believe he wrapped up his wife's remains in the bags after dismembering them, and used the other items to clean up the hotel room. Nevertheless, Everilda's blood was found in John's blue 2001 Jeep Grand Cherokee and in the carpet and shower area of the hotel room. John stated his wife had accidentally cut her finger inside his vehicle, but there was too much blood there to come from a minor injury. Everilda's remains are believed to have been dumped somewhere between between Las Vegas and southern California.

John is awaiting trial for his wife's murder. Additional traces of her blood were found on a utility knife and some trash bags at his home after his arrest. Prosecutors are seeking the death penalty against John. In an April 2008 media interview, he said he believed Everilda is dead but that he did not harm her and did not know who did. He added that he was dying of cancer and did not care what happened to him.

Everilda has three children. At the time of her disappearance she was employed in a school cafeteria. Foul play is suspected in her disappearance due to the circumstances involved.

Above: John Watson