Florida man raged over vaccine while his father begged for mercy

In Florida, Brian McGann Jr. accepted a second-degree murder conviction after prosecutors first charged him with first-degree murder.

WEST PALM BEACH, Fla. — Brian McGann Jr. avoided a murder trial but received a 38-year prison sentence after pleading guilty to killing his father in a Palm Beach County case built on a 911 call, blood evidence and medical findings.

The plea changed the legal path of a case that began with a first-degree murder charge after Brian McGann Sr. was found dead in his living room in February 2024. McGann Jr. pleaded guilty to second-degree murder in May 2026. Circuit Judge Sarah Willis sentenced him to state prison and gave him credit for 830 days already spent in the Palm Beach County Jail.

The court outcome marked a sharp shift from the original charge. A first-degree murder case can bring a trial focused on planning, intent and the sequence of events before the killing. The second-degree murder plea resolved the case without asking jurors to decide those questions. It also meant prosecutors did not have to present witnesses in open court about the late-night phone call, the condition of the home or the medical examiner’s findings. For the defense, the plea removed the risk of a trial on the top charge. For the court, it ended more than two years of proceedings tied to the death of McGann Sr.

The evidence described in the arrest report began with a longtime family friend who said she heard the fatal attack over the phone. She told investigators she had spoken with McGann Jr. throughout Feb. 4, 2024, and that he sounded intoxicated, frantic and paranoid. Earlier that evening, she said, he told her to pack her belongings and leave because “he was going to be dead.” She found the statement strange because she lived in Middleburg, many hours from the home in Palm Beach County. Later, she said, McGann Jr. told her he was pulling into his father’s residence after leaving a Wellington bar.

The probable cause affidavit said the call then turned into an account of violence. The family friend told detectives she heard McGann Jr. aggressively screaming at Brian McGann Sr. and heard sounds that she described as slapping. She said the call lasted about 20 minutes and became more chaotic as the attack continued. During the call, she heard the elder McGann say, “Stop, you are killing me,” according to investigators. When she asked about his condition, McGann Jr. said, “He is under my foot.” The witness also reported hearing McGann Jr. ask his father for the combination to a safe.

Palm Beach County sheriff’s deputies responded to the home shortly after 11 p.m. on Feb. 4, 2024. They said they saw McGann Jr. jump a back gate into a neighbor’s yard and then found him hiding nearby. Investigators said he was covered in blood from head to toe and had swollen, injured hands. After he was detained, deputies forced entry into the home. They found McGann Sr. unresponsive on the living room floor with severe injuries to his face. Blood covered his clothing, and blood spatter was visible on walls and furniture around him. Paramedics pronounced him dead at the scene.

The Palm Beach County Medical Examiner’s Office ruled the death a homicide caused by blunt force trauma. That finding became a key part of the prosecution’s case because it tied the condition of the victim’s body to a violent beating. The arrest report did not publicly identify a weapon, and the accounts released in local reporting focused on physical force. Deputies also documented the condition of McGann Jr.’s hands and the blood on his body. Together, those facts helped support the original murder charge and later formed the backdrop for the plea to the reduced count.

The case also included allegations about McGann Jr.’s state of mind before the attack. The family friend told investigators that he had recently begun using cocaine and had become angry after learning his father received a vaccine. She described him as a conspiracy theorist and said his behavior that day was erratic. The records cited in public reporting did not name the vaccine. They also did not establish that the vaccine allegation was the only reason for the attack. At sentencing, the court resolved the criminal charge through the plea rather than a trial record that might have tested each statement before a jury.

The difference between the arrest charge and the plea charge made the sentencing hearing the final major public step in the case. McGann Jr. had been held in county custody since his arrest, and the 830-day credit reflected that time. The 38-year term means the punishment remains measured in decades, even after the reduction from first-degree to second-degree murder. The plea did not erase the facts documented by deputies. It set the legal conviction and penalty without a trial verdict. The court’s judgment now controls the case unless any later filing challenges the plea or sentence.

The home where the killing happened was described in reports as being in suburban Lake Worth or Lake Worth Beach. Deputies and paramedics arrived there after the 911 call from the family friend. The caller’s distance from the scene became a notable feature of the case because she was not a neighbor hearing noise through a wall or a passerby outside the home. She was on the phone as the incident unfolded. Her account gave investigators a timeline that began before deputies arrived and continued into the moments when McGann Sr. could still be heard speaking.

With the plea accepted and the sentence imposed, the public trial that had once been possible will not occur. The criminal file now records a second-degree murder conviction, a 38-year sentence and credit for time served.

Author note: Last updated June 16, 2026.