Four jurors were selected Tuesday at the start of a murder trial for Karen Read, the Massachusetts woman who is accused in the 2022 death of her Boston police officer boyfriend, John O'Keefe.The four were selected from a pool of 88 people. Another pool will be convened on Wednesday as the process continues. Ahead of the trial, which has brought contentious debate and protest, the judge has ordered a "buffer zone" around the courthouse. Massachusetts State Police reiterated that order in statements on Monday. Read, 43, of Mansfield, is accused of hitting John O'Keefe, a Boston police officer, with her vehicle outside of a home in Canton during a snowstorm on Jan. 29, 2022. Prosecutors say Read and O’Keefe had both been drinking that night.Potential jurors filtered into the courtroom Tuesday morning, where Judge Beverly Cannone laid out the details of the case and named the people who may be called to testify, which included several law enforcement officers from state and local departments.According to court documents, prosecutors plan to call up to 87 witnesses during the trial. The defense plans to call up to 77. Cannone told potential jurors on Tuesday that the trial is expected to last 6-8 weeks after the jury is seated.After Cannone explained basic legal concepts and asked some public questions of the jury pool, questionnaires were distributed to each member of the group. Individuals were then brought one at a time to the judge's sidebar to be interviewed. Read and her defense team claim she is the victim of a coverup. They claim O'Keefe was beaten inside the home, bitten by a dog and then left outside. She has pleaded not guilty to charges including second-degree murder.Last week, Read's defense said they will be arguing during the trial that someone else killed O'Keefe that night. Cannone said on Tuesday morning that she will, at least for now, allow the defense to pursue that strategy. Read's supporters often demonstrate outside the Norfolk Superior Court building during her hearings, and some have worn clothing with messages about the case into the courthouse. Following a hearing about the issue earlier this month, Cannone issued an order prohibiting any demonstrations from occurring within 200 feet of the courthouse complex during the trial. Cannone's order also prohibits protesters from using "audio-enhancing devices."Inside the courthouse, Cannone's order prevents anyone from wearing any buttons, photographs, clothing, or insignia relating to the case. She also prohibited officers who are testifying or attending the trial from wearing their uniforms. The full order states: "It is Ordered that no individual may demonstrate in any manner, including carrying signs or placards, within 200 feet of the Courthouse Complex during trial unless otherwise Ordered by this Court. This complex includes the Norfolk Superior Courthouse building and the parking area behind the Norfolk County Registry of Deeds building. Individuals are also prohibited from using audio enhancing devices while protesting."It is further ORDERED that no individuals will be permitted to wear or exhibit any buttons, photographs, clothing, or insignia, relating to the case pending against the defendant or relating to any trial participant, in the Courthouse during the trial. Law enforcement officers who are testifying or are members of the audience are also prohibited from wearing their department issued uniforms or any police emblems in the Courthouse."Previously, Cannone denied Read's motion to dismiss the case and denied a request to disqualify the District Attorney but agreed to compel the prosecution to provide notes and other documents related to the case.Last month, Massachusetts State Police confirmed the department had opened an investigation into Trooper Michael Proctor, the lead investigator in the Read case. The department did not specify what the potential violation was or if it was related to Read's case and said Proctor would remain on full duty during the internal investigation.During February, the prosecution also revealed the existence of text messages suggesting a "romantic entanglement" with a friend who was present at locations Read and O'Keefe visited on the night of the incident.Additionally, prosecutors described evidence from voicemails and text messages on O'Keefe's phone that "detailed strains" in his relationship with Read and his desire to end that relationship. Some of the voicemails are described as Read screaming about hating him and accusing him of sexual activity with "another girl.""The defendant complains that the Commonwealth attempted to besmirch the defendant in some manner and fabricate problems within her relationship with the victim as a motive for murder by introducing testimony about an incident four weeks prior in Aruba. Yet the defendant avoids mention or challenge to the venomous voicemails she left on the victim's cellphone as well as evidence of other issues in their relationship, including the defendant's recent romantic entanglement," prosecutors wrote.Video below: Alleged connection between Read, controversial bloggerRead's defense and prosecutors have repeatedly disagreed about the time that a witness used their cellphone to search “hos long to die in cold." Her defense said that the search was entered at approximately 2:30 a.m., hours before the body was found, but the prosecution wrote in their new filing that three experts agree it was done at approximately 6:23 a.m. after O'Keefe was found.Read is also accused of having frequent contact with a controversial blogger known as "Turtleboy," Aiden Kearney, who now faces charges in related cases.