"We will not go quietly. We will not go gently into the good night."

Brandon Bar wrote those words the day he discovered his best friend, a U.S. Marine, was found dead in a Belize field. The circumstances surrounding the death of Drew Devoursney and his girlfriend Francesca Matus are a mystery Brandon is determined to uncover.

Drew and Brandon met serving together in Fallujah in 2004. In 2016, Drew completed diving school and moved to Corozal, Belize. The town of just over 20,000 was gaining a reputation as a growing community of expatriates.

While there is no official travel warning for Belize, the U.S. Department of State does warn the country is "rated high for crime" and "criminals frequently target tourists, including those at resorts and on the roads and riverways". Perhaps most daunting to Drew's family, this additional warning: "The majority of crimes remain unresolved and unprosecuted. A lack of capacity, resources, and training impedes the ability of local police to effectively investigate crime and apprehend serious offenders."

Drew's family and friends are his death will have answers. On a GoFundMe page, Brandon has set a goal to raise $20,000 for a private investigator and other resources to track down those answers.

"I will not let anyone to allow his death be the end of it all. Today is the day where I demand answers to so many questions all of us have about this whole mysterious abduction and their senseless deaths," he wrote.

Here's what we know about the couple's disappearance and death:

TIMELINE | According to family friend Brandon Barfield

► Tuesday, April 25: Francesca is spotted at a grocery store in Corozal Tuesday morning. That night, Francesca checks in for her flight home to Canada. At 11 p.m., the couple was last seen waving goodbye to their friends at Scotty's Bar.

► Wednesday, April 26 8:30 a.m. : A friend arrived at Francesca's home in Belize to pick her up for her flight. He noticed her Isuzu Rodeo was missing. Inside the home, he found packed luggage, cash, and passports for Francesca and Drew. There was no sign of a struggle.

► Thursday, April 27: A search party was organized and retraced the couple's last known whereabouts. Helicopters searched for her missing vehicle.

► Sunday, April 30: The white Isuzu was found north of Corozal in a sugar cane field.

► Monday, April 1: Belize authorities contact families to inform them they've found Francesca and Drew's bodies

"Today is the first day of seeking out the people who are responsible for robbing us of the ones we love," Brandon said. "I want you to know that it is not over yet."