SAN JOSE, Costa Rica -- The body of Rigoberto Alpizar, the man shot and killed by air marshals last week at Miami International Airport, was returned to his native Costa Rica Tuesday.

Funeral services will be held for Alpizar in Cariari de Pococi, a town about 45 miles outside the capital San Jose.

U.S. federal officials say Alpizar made a bomb threat in the jetway at Miami International Airport after running frantically out of a plane. They said they opened fire because Alpizar ignored their orders to stop and instead reached into his backpack.

No bomb was found after last Wednesday's shooting. Witnesses said amid the chaos, his wife frantically shouted that Alpizar was bipolar, and hadn't taken his medication.

The man's father, Carlos Alpizar, who received the body at the San Jose airport, said his son was unjustly killed "because there was no time between talking to him and shooting to kill him."

"It was absurd what they did," his father said of U.S. marshals.

Alpizar's family in Costa Rica has said they were unaware he suffered from any mental illness. Carlos Alpizar said his son called him often and came home last July to accompany him to see a doctor for a heart problem.

Alpizar is to be buried next to his mother, who died 11 years ago.

His brother, Rolando Alpizar, said the family is still waiting for an explanation from U.S. authorities.

Rigoberto Alpizar, 44, left Costa Rica for the United States two decades ago. He became a naturalized U.S. citizen and worked for the U.S. hardware chain Home Depot, living in the Orlando suburb of Maitland.