I can see that you are using taxonomies type "tags" to store the Lawyers in the Cases, but there are two options to work with many relationships, look:
- http://wp-types.com/documentation/user-guides/many-to-many-post-relationship/
- http://wp-types.com/faq/how-do-i-associate-one-child-with-several-parents-of-the-same-type/
