Your obvious expertise and empathy in dealing with this matter was greatly appreciated.
There are really no words to express our gratitude and appreciation. 'Thank you' just doesn't seem like enough. As you know, it was a long and upsetting process for my family, which would have been a great deal longer had it not been for the hours you put in to help me clear my brother's name. I am so grateful that you put up with all the stress his case has caused, I know that it must have been very laborious at times! We would like to express our appreciation for your professional, experienced and effective assistance during this difficult time. Your obvious expertise and empathy in dealing with this matter was greatly appreciated.