How can I remove one user from posting in an embedded search widget?


Im running a website, Nhv.Org which is based solely on the twitter hashtag for new haven, (#Nhv).
lately an indonesian rock group has taken a liking to the same three letters, and they’re blowing up the spot on occasion.

OK so i figured out how to remove users. go to search, and use syntax -nameofuser to remove that user from the return on the list.
My question is… is there a way to remove all Retweets by that user?

The work going on here is highly suspicious of some fake follower retweeting.