Hi,
The arrest has happened four months before so police had enough time to file charge sheet, now your lawyer should ready for argument and if the court is convinced about the reasons, it will grand bail, in case it fails you will have to wait for the charge sheet to be filed. As you say your uncle is innocent provide the evidence before the court.Since it is 4 months, the police should have finished the investigation , and filed the chargesheet,your lawyer certainly be arguing on this.