Dang Tang, 61, was last seen leaving his brother’s home in Phoenix, Arizona, at about 11:30 a.m. on March 1, 1999. A Vietnamese immigrant who lived near North 47th Avenue and West Bethany Home Road, he was described as an Asian male with black hair and brown eyes, between 5 feet 6 inches and 5 feet 7 inches tall, weighing 190 to 200 pounds. He wore a light blue long-sleeved shirt and dark pants when he disappeared.

Two months later, on May 1, 1999, Mr. Tang’s gold 1998 Toyota Camry was found abandoned in the terminal four parking garage at Sky Harbor Airport. Investigators determined the vehicle had been left there since the day he vanished, and unspecified evidence inside the car led authorities to treat the case as involving possible foul play. The case is classified as an endangered missing person and remains an active investigation with the Phoenix Police Department.

What information might help explain why his car was left at the airport that morning or what happened after he left his brother’s house?