William O'Neil has over 25 years' experience in the Massachusetts Superior, District, and Appellate Courts, and the Federal District Courts in Springfield, Worcester, and. Boston. He has a proven track record of success in notable trials such as:
Stanley Slonka – Mr. Slonka was convicted armed assault with intent to murder in Springfield. He served five and a half years in state prison before an appeals court ordered a new trial. Attorney O'Neil was appointed to represent Mr. Slonka at his re-trial. After a two and one-half week jury trial, Attorney O'Neil obtained a not guilty verdict for Mr. Slonka and he was freed.
Charles Wilhite – In this well publicized case, Mr. Wilhite was initially convicted of murder for hire of an individual outside of a storefront in Springfield. After the first trial, two government witnesses came forward indicating that they had been pressured to implicate Mr. Wilhite. Attorney O'Neil fought for and won a new trial on Mr. Wilhite's behalf. He obtained an acquittal for his client at the second trial which allowed Mr. Wilhite to return to live with his family.