The
first major case that Clifford prosecuted was for the murder of
Boston Brahmin George Parkman, and it was one of the most sensational of the 19th century. Parkman had disappeared in November 1849 and
Harvard professor
John White Webster had been arrested for his murder. The gruesome method of the body's disposal (which was not complete), the fact that it was a capital crime, and the high status of both victim and accused ensured a great deal of public interest in the case, and the courtroom was packed. Clifford's case was complicated by the fact that there was no actual body. Assisted by
George Bemis, who had been retained by the Parkman family, he resorted instead to
dental forensics and strong circumstantial evidence to build the case against Webster. There was much controversy afterward concerning the jury instructions given by Chief Justice
Lemuel Shaw, but Webster was eventually hanged after confessing the crime. The case has continued to interest legal scholars, in part over allegations that the defense (which included one lawyer lacking significant criminal trial experience) failed to aggressively dispute the evidence presented, and also did not introduce potentially exculpatory evidence. (portrait by
William Morris Hunt) presided over the
Parkman–Webster murder case and was a friend of Clifford's In 1852 the state Whig Party parlayed his popularity in the Parkman case into a nomination for the governorship, which Clifford reluctantly accepted. although fractious Whigs demanded the replacement of Senator
John Davis in exchange for their support for him. After his single term as governor, Clifford refused to stand for reelection, preferring to work as a lawyer. His successor, Governor
Emory Washburn, reappointed him to be attorney general, an office he held from 1854 to 1858. This term of service notably included the tenure of
Know Nothing governor
Henry J. Gardner. Gardner, who had politically been a Whig before the advent of the Know Nothings, retained Clifford in the office, and the two of them blunted some of anti-immigrant legislation and (in their view) extreme reform proposals of the Know Nothing legislature. During Gardner's tenure, the
state constitution was amended so that the office of attorney general was elected rather than appointed. In the election of 1858,
Stephen Henry Phillips was elected to replace Clifford. ==Later political and legal work==