Criminal complaints with regard to cheque dishonor

My friend was detained by police at Dubai airport while coming back from India for a cheque which bounced 3 years back.

The person did not give back my friend's cheques which equalled to around AED 600000 & has registered a complaint now in Ajman.

This cheque was given as a guarantee and the drawee was not supposed to present it to the bank. My friend kept asking for his cheques back after the deal was closed but he wouldn't give.

He assured it won't be presented in the bank. But he presented it & kept silent for more than 3 years & now has registered the case. Now he is detained by the police in Ajman.

What is going to happen in his case? How long will he be detained at the police station until the court decides?

What will be his penalty? So what I need to know is that can anybody file a case after more than 3 years?

How can he apply for bail & does he have to pay for it? Is there a minimum period he has to be in detention before he gets bail?

How long will it take for the judgement to be made?