Yes.  Although investigators do not have the same search bar as administrators, they are able to search for and view more of their cases if they have a lot.

When investigator user login into the system he/she can see dashboard like below.
1. In the right top corner of the "Active Cases" box, there is an EYE icon used to see all assigned cases.

2. The Investigator can also use Calendar to see assigned cases on certain dates.