Michael J. Aguilar, chief of the TSA office in San Diego, called a news conference at the airport Monday afternoon to announce the probe. He said the investigation could lead to prosecution and civil penalties of up to $11,000.

TSA agents had told Tyner on Saturday that he could be fined up to $10,000…

According to Aguilar, Tyner is under investigation for leaving the security area without permission. That’s prohibited, among other reasons, to prevent potential terrorists from entering security, gaining information, and leaving.