If not F-1 and citizen, who else can bail them out ? Green card holder can help them to take a bail ?
Will this arrest show on their background check ?
Moreover, if they are arrested, will it reflect on their record ?
Anybody can bail anybody out by paying the bail bond. The person arrested would face issues as it would be reflected on his record and he will have to fill applications honestly. Traffic violations such as speed tickets may be considered minor. What was the arrest for?