Guatemalan foreign minister Sandra Jovel said Adelson provided the plane last week to carry government officials and guests, including religious leaders. Jovel made the comments on radio show ConCriterio, ending days of speculation in Guatemala about who paid for the trip.
Manfredo Marroquin, director of civil society organization Citizen Action, said President Jimmy Morales' administration violated Guatemalan law, which forbids accepting such gifts. Guatemala's human rights prosecutor, Jordan Rodas, also said the arrangement with Adelson was concerning.
"You don't know if what he's doing is laying the groundwork for personal interests," Rodas said. Jovel emphasized that Adelson did not have business interests in Guatemala. Morales' decision to move Guatemala's embassy just two days after the U.S. did the same was seen by many as an attempt to curry favor with U.S. President Donald Trump.
Morales has been battling aggressive prosecutors looking to investigate corruption allegations swirling around him. Local prosecutors are supported by a United Nations anti-corruption commission that is funded in part by the U.S.