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When Vinigo was arrested, he was taken to the underground of the Upper City Guild building, this being the only place where the remaining Adventurers in Oukiwa continued to frequent every day. Therefore, this was also one of the best guarded places in the entire city.
At Namor's own request, Luke personally assisted in escorting the carriage before he could return to the Strogueher estate and tell everything to his friends and his mistresses.
Before leaving the Academy, Vinigo's hands were locked with restraining gauntlets, and his mouth was also encased with a special device. These two restraints prevented him from using any Gene Skills or Magic.
Vinigo would also never taste food again, as it would be dangerous to release the restraint from his mouth, so the death row guards would just inject the necessary nutrients every day into his veins.