CORPUS CHRISTI, Texas (CBSDFW.COM/AP) — Police have arrested a man in Mexico who’s suspected of stealing a car that belonged to the New Hampshire couple found buried at a South Texas beach last week, authorities said.

Kleberg County Sheriff Richard Kirkpatrick told a local news station in Corpus Christi that Adam Curtis Williams was arrested by authorities in the Mexican state of Jalisco on felony theft charges Wednesday.

READ MORE: Tarrant County Public Health Director Talks With Concerned Moms About Kids, Classrooms And COVID-19

Adam Curtis Williams (Kleberg County Sheriff’s Office)

Authorities believe the 33-year-old Utah native and Amanda Noverr might have had contact with 48-year-old James Butler and 46-year-old Michelle Butler before they died. They released a surveillance photo of Williams and Noverr crossing the border into Mexico in the Butler’s car.

READ MORE: At Least 10 Dead, More Than A Dozen Injured After Overloaded Van Carrying Migrants Crashes In South Texas

James Butler’s sister, Debbie Van Loon, told a New Hampshire news station that they were “glad to hear the arrest has been made and await what’s next.”

Officials said the Butlers’ deaths are being investigated as homicides.

MORE NEWS: 'Wow, There Goes The Ground': North Texan Wally Funk Shares Story Of Her Dream Journey Into Space

(© Copyright 2019 CBS Broadcasting Inc. All Rights Reserved. The Associated Press contributed to this report.)