A Tacoma dentist, repeatedly accused of mistreating young patients, is again facing charges from the state dental board.

Last year, KIRO Team 7 Investigators first revealed that Dr. George Brain earned millions of tax dollars doing dental procedures on low income children -- even after he was sanctioned by the Department of Health following a series of complaints about his professional conduct.

In a statement of charges filed June 24, 2008, the dental board accuses Dr. Brain of making some sort of mistake on seven young patients. It is not the first time his work has been called into question

Brooke Laducer complained to the dental board after three of her children -- Karisa, Courtney, and Cameron -- all had bad experiences at Dr. George Brain's office.

Now, after a long investigation, the dental board is seeking to sanction Dr. Brain for his treatment of the Laducer kids and four other low-income families with children.

It has filed charges of unprofessional conduct regarding Dr. Brain, accusing him of violating professional standards on record keeping, anesthesia use and nitrous oxide sedation.

Statute defines unprofessional conduct as "incompetence, negligence, or malpractice which results in injury to a patient or which creates an unreasonable risk that a patient may be harmed."

Brooke Laducer, who no longer takes her children to Dr. Brain for dental work, recently spoke with KIRO Team 7 Investigative Reporter Chris Halsne.

“It was a traumatizing experience for them and even still to this day, to take them to the dentist, it's frightening for them. Myself or my husband, we hold their hand or the dentist and dental assistants take them through every step and explain what they're going to do. They're still very uncomfortable with going to the dentist to this day."

State health records show Dr. Brain allegedly "failed to document the concentration and amount of anesthetic administered" for two of the Laducer children, then allegedly failed to obtain informed consent to place "crowns" on some teeth of another.

Health Systems Quality Assurance Assistant Secretary Karen Ann Jensen tells KIRO Team 7 Investigators that record keeping and drug administration issues are serious matters.

“It suggests there's a pattern of failure to appropriately document the medications given during the course of treatment.”

Jenson also tells us the dental board is seeking to punish Dr. Brain for "allegations related to safe practice and standards of care" -- and not just for the Laducer children.

“In this case, five different complaints were investigated. There were a number of different allegations and it does take time. The important thing for us is that at the end of the process, we want to be very careful and make sure there is enough evidence to support the charges. We take every one of these complaints very seriously.”

Complaints like this one -- involving a child labeled only as Patient E. Dental investigators allege that Dr. Brain failed to tell the patients parents "that he left a root tip after extracting one of the teeth."

Jensen says because Dr. Brain has already been disciplined once and placed on indefinite monitoring back in 2006 he could face additional consequences this time around.

“The range would be from suspensions, remedial training, all the way up to license revocation.”

Dr. Brain has asked for a hearing to dispute the allegations and Brooke Laducer says she will be there with some other concerned parents, urging the board to send a clear message to the dentist.

I'm satisfied to a certain extent because they have taken a step forward, but I'm disappointed that there isn't more to it. That there aren't more charges - more severe charges against him. I'm not going to necessarily accept a slap on the hand or we'll send you through some monitoring classes. That’s not acceptable.”

Despite being previously disciplined, the state of Washington did not stop sending low income children to Dr. Brain for care. Since January 2007, Dr. Brain has billed the Department of Social and Health Services more than $2,000,000 for doing dental work for families on welfare.

We called Dr. Brain's attorney to see if he would like to speak with us about these charges, but KIRO-TV did not receive any response.

It should be noted that last year Dr. Brain has filed a defamation lawsuit against KIRO-TV and investigative reporter Chris Halsne in Pierce County court.