Authorities have released more details on a Delta co-pilot arrested Saturday night after flying from Minneapolis to San Francisco for allegedly committing sex crimes against a child.

Deputies and Homeland Security Investigations agents arrested the 34-year-old pilot, identified Monday by the Contra Costa Sheriff’s Office as Rustom Bhagwagar, of Florida, on five counts of oral copulation with a child under 10 years of age. The Contra Costa County Sheriff’s Office says the department has been investigating the pilot since April.

Rustom Bhagwagar remained held on $5 million bail early Monday afternoon on suspicion of several sex crimes, the sheriff’s office said.