Dealing with Negative Reviews on Google
Reviews are a double edged sword and negative reviews can be a real problem for business owners when they inevitable occur. One of the most basic steps to take in order deal with negative reviews is to respond in a professional manner, logged in as the owner. In the event of false and/or inappropriate review Google does have a process to possible removal of reviews.
Below are a few useful articles:
How To Remove Slanderous Google Reviews – A Case Study by Steve at SEOno
How to get Google Places review removed by Tom Peary at GEO21