Nole E. Remagen suffered a stroke on Sunday while traveling, the U.S.
He had been receiving treatment at a hospital in Scotland but died from the on Tuesday surrounded by his family, the White House said.
The service said Remagen "exemplified the core values of the Secret Service - Justice, Duty, Courage, Honesty and Loyalty". "You have all treated Special Agent Remagen as one of your own, and for that we are eternally grateful".
The expenditures, totaling $69,767, were made by the State Department on behalf of the U.S. Secret Service, tasked to protect the president and his family members during their trips overseas.
White House press secretary Sarah Sanders said in a tweet Wednesday, "Prayers for the Remagen family".
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Remagen's body was due to arrive at Joint Base Andrews in Maryland, just outside Washington, on Wednesday afternoon.
President Donald Trump plays the Ailsa course at his Trump Turnberry resort in South Ayrshire, July 14, 2018.
"The State Department frequently assists other US agencies, including the Secret Service, with transportation arrangements and in making hotel bookings overseas", a State Department spokesperson told ABC News.
The US secret service confirmed the death "with great sadness and regret" in a statement and described the man as a "dedicated professional of the highest order". Trump released a tribute to the special agent and the Secret Service, stating that "we are forever in their debt".
The Secret Service has about 3,200 agents.
The agent had 19 years in the service, and had followed Trump to Europe to work on Presidential Protection.