Their stays were discovered Sunday on a Padre Island seaside in Corpus Christi by a Kleburg County Deputy.
Law enforcement officers "are working on identification of persons of interest and attempting to find the whereabouts of the victims' truck and RV trailer", the office said in a news release, the AP reported. Lauderdale, Fla. They were last seen alive at Padre Balli Park RV park on October 15, according to the Kleberg Co.
Kleberg County Sheriff Richard Kirkpatrick said that any additional information will not be released at this time as the investigation is ongoing, and the KCSO is using "all of its resources". The two had been traveling the country taking part-time jobs since 2018.
"It's not very often we have a mobile crime scene if the crime was committed say in the trailer", said John Matthews of Community Safety Initiative.
The Nueces Medical Examiner's Office have ruled their deaths homicides.
James and Michelle Butler's bodies were found buried on a remote beach and their RV and truck were seen on surveillance video driving into Mexico.
Out west, they told relatives when they'd be off the grid and reached out as soon as their service returned, remembers James' sister, Deborah van Loon.
Friends of the couple reportedly told investigators the two were traveling to Fort Lauderdale, Fla. and were scheduled to arrive there November 20.
Described by their family as avid travelers, the Butlers had embarked on a cross-country road trip with plans to go to Florida to sell Christmas trees.
The Butler's were in frequent contact with family members and shared photographs of their adventures on Facebook.
James was designed subsequent to serving 21 years in the U.S. Naval force.
She said the family is looking forward to finally starting the grieving process, but she said they won't be able to get proper closure until justice is served.