Multiple reports in U.S. and Canadian media have revealed the details currently known about the gruesome murder of a Canadian woman and her U.S. boyfriend near the northern Belize town of Corozal.

Belize police determined that theft was not the motive of the murder as no money or jewelry were stolen from the couple.

Of two people detained this week as suspects in the murder, one Canadian man remains in police custody as “a person of great interest in the case,” according to Canadian media. The man, whose identity has not been revealed, is being held in the coastal town of Placencia as a suspect in a separate case of burglary. Corozal police spokesman, Raphael Martinez, said the Canadian suspect was a tenant living on Matus’ seaside property.

The murdered couple, former U.S. Marine Drew DeVoursney, 36, whose family is in Atlanta, Georgia, and Francesca Matus, 52, of Keswick, Ontario, Canada, had been dating for about three months, and were last seen April 25 leaving Scotty’s Bar and Grill in Corozal at around 11 p.m.

Their decomposing bodies were found in a sugar cane field Monday, May 1 near Matus’ abandoned vehicle outside of Corozal. Their wrists were duct-taped, and strangulation has been ruled the apparent cause of their death. Officials reported that Matus had planned to travel to Canada the day following her disappearance, and her luggage was found in her house.

DeVoursney’s mother requested the assistance of the United States Federal Bureau of Investigation to aid in uncovering the details surrounding her son’s murder, a move that was welcomed by Belizean authorities.

Brand Barfield, a friend of DeVoursney who started a GoFundMe page when the couple went missing after April 25, said, “I met my best friend, Drew DeVoursney, while serving in Fallujah, Iraq, in 2004 with 1st Marines. After that, he went back for another tour in Iraq with 11th Marines. Then he served as a contractor in Afghanistan.”

“We appreciate any assistance that we can get, to get to the bottom of this,” said Martinez. “And if we have some Canadian officials who want to be part of this (investigation), we have absolutely no problem with that,” who said he had no details yet of the FBI’s investigation.