How to delete unique messages that all have the same title

[Clinton Smith]

We occasionally experience bulk phishing campaigns where the subject and MOST of the body (except for the signature) of each note is the same.  The emails are individually delivered, thus each has a different message ID.  If we have a list of email addresses who received such malicious messages, what is the GAM syntax to search a user's email account given a subject and/or body text and then delete that message?

Thanks,

Clinton