Edwin A. Seibel

Neither Seibel nor Potvin met their would-be assailant, and ongoing efforts by Holyoke Police across state lines through at least the 1970s turned up no new leads; to date Noel's murder, and the threats that followed, remains an open case.

With the case remaining unsolved, by November 11, 1954, a rift had apparently arisen between Seibel and Chief Potvin, who had been the youngest appointed to the post when he had been installed on June 8 of the previous year. In Holyoke's city government, mayors effectively serve as police commissioner, appointing and negotiating the terms of the police chief's contract directly. During Potvin's own tenure under Seibel, he had refused to comply with several orders from the mayor saying they were "unnecessary and inconsiderate", including one to place 1 patrolman to a car per beat. At the time when he forced out the chief, Seibel dismissed concerns that his removal was politically motivated, but the chief would not discount this. He would tell the Springfield Union the mayor had demanded his resignation "for the good of the service" and when he initially refused, a point he made explicitly in his send-off note to the officers, he was given a termination of employment notice within hours of his meeting with the mayor. Potvin was replaced on November 10, 1954 by Col. William H. McGarry, a retired National Guard veteran was who immediately sworn in by City Clerk Joseph Jubinville later that afternoon. McGarry had previously served as chief under Mayor Gregory J. Scanlon in 1927, then-known by the title of "city marshal".

On August 19, 1953, only months after assuming the mayoralty, the mayor and his appointed chief of police William H. Potvin would receive a death threat written as a crude ballot. The letter, written in a shaky hand, was received the morning after the murder of leader of the local Republican committee, Alderman Henry H. Noel, in his home at 2am. On it, Noel's name appeared with an "X" along with the names of the other two. He, Potvin, and Seibel had received a number of calls in the wee hours of the morning, made from public pay stations in the city and laden with profanity and threats. It was reported that leading up to his murder, Noel's had been from multiple people, including at least one who spoke broken French, and at least one specifically blaming him for a recent shake-up in the police force. Several suspects in Noel's murder were rounded up and fingerprinted to compare with one lifted from a screen door at Noel's home believed to have been made during the incident.

Edwin A. Seibel (January 9, 1902 – September 9, 1957) was an American journalist, activist, legislator, executive director of the Holyoke Taxpayers' Association, member of the Massachusetts House of Representatives, and the 34th mayor of Holyoke, Massachusetts. Between his unorthodox lack of political allies, nomination by both Democratic and Republican parties in the same election, management style, and tenure as both a state representative and mayor concurrently, Seibel was described posthumously by a columnist for the Boston Traveller as “the most controversial mayor in Holyoke’s history”. During his tenure, Seibel oversaw the reduction in size of the Board of Alderman, a predecessor of the city council from 27 to 11 members.

Edwin Andrews Seibel was born in Holyoke on January 9, 1902, to John and Cora L. Seibel (née Benhard). He attended Holyoke High School and graduated in the class of 1921, before attending Troy Conference Academy, better known as Green Mountain College. Subsequently he entered journalism and spent several years as sports editor for the Holyoke Telegram, prior to its merger with the Transcript. Following the merger Seibel joined the staff of the Springfield Union as a sports writer and general news reporter, publishing accounts for that paper as well as the T-T for nearly 17 years before his departure for the Taxpayers' Association. He took special interest in the Springfield Union's annual marble tournament, even producing a competitor who would go on to represent the paper's team in the nationals. He was a prominent member of the "Holyoke Fourth Estate", a reporters fraternity, and in his own interest wrote a length history of the athletic notables of the city at a school, college, and professional level. Seibel was also described as active in the Holyoke YMCA for many years.