## they were troubled ##
"worried" or "distressed mentally"
## had taken financial security ##
"bond" or "deposit" or "fine" (UDB). This money was a promise of good behavior, which might be returned if all went well, or used to repair damages brought on by bad behavior.
## and the rest ##
"the believers other than Jason"
## they let them go ##
"the officials released Jason and the other believers arrested"