Actually, Vice Admiral is an O-9. Based on his bio, he has over 34 years of service, so base pay alone is $16.4K/month. Probably lives in base housing, so with BAS and sub pay it totals close to $17K/month.
If found guilty in the investigation, he will probably be retired at a lower rank. In addition to whatever civilian penalties are incurred. Assuming that there are no instances of military misconduct found, otherwise all bets are off.