Oil tycoon Wilmer Ruperti showed up for a meeting with Venezuela’s intelligence agency last Thursday. A week later, he’s still in custody, one of his lawyers told Semafor.

“We’ve reached out to everybody trying to get proof of life or some support,” Winston & Strawn’s Cari Stinebower said, adding that officials still haven’t conveyed “how he’s being treated or why he’s being detained.”

Ruperti, who arrived at the meeting with a security detail, is a Venezuelan Italian shipping magnate who trades in petroleum coke. His detainment followed interim President Delcy Rodríguez’s decision to elevate the agency’s longtime chief to defense minister.

“The message is that Venezuela is open for business — but detaining businessmen for days on end without any due process or access to counsel is more old regime,” Stinebower said. “This is not law and order and not conducive of a welcoming business environment.”

The State Department and Energy Department did not respond to requests for comment.