Crystal Report subreport

I have a report pulling information and have a two folded question

Example:

     Incident     Incident Nature             When Reported       Offense     Circum    

16XX00XX1   ANIM COMP 15          1/29/2016 15:17:52     ANPR     ANSTL

16XX00XX6     SUSP CIRC 15          1/29/2016 16:42:35     SUSP     ARHWY

16XX00XX7   PREM CHEC 15          1/29/2016 23:29:09     XPTR     ARBUS

16XX00XX7   PREM CHEC 15          1/29/2016 23:29:09     XPTR     ARGOV

16XX00XX8     TRAFFIC STOP          1/30/2016  15:04:36     TOFF     ARHWY

etc...

Some incidents have multiple Circum within - so:

Question 1

     How do I get the Circum field to show multiple items?  instead of creating multiple lines for each incident.  I thought this would be done with Section Expert but that appears to do it on all items not just CIRCUM field.

Question 2

     How would I go about getting a footer or some other area to list each Circum with a total number used within the reporting period?  So group all ARHWY and put count of 2, ARBUS count 1 etc....