A family of Microsoft relational database management systems designed for ease of use.
So, I would create a main form bound to PendingCaseTbl. Place controls on the mainform that will display data from that table. Then add a Tab control. On each Tab place a subform bound to the related table(s) and linked on the key fields.
There is a bit of a trick to placing the subform on the Tab page. When you select the page then select the subform control from the tool box, when the cursor is within the tab page a shaded box will appear, draw the subform within that box.