Arizona Man Accused of Killing Unarmed Driver With Suppressed Pistol After Argument Over Merging on Highway

A minor disagreement over who had the right to merge onto a highway allegedly ended with one man dead and another facing a second-degree murder charge in Arizona. William McGinty, 43, was arrested following a fatal shooting near Loop 101 in Scottsdale on November 3, 2026. Investigators say the confrontation began with a traffic dispute but escalated after both drivers pulled over near 87th Street and Cactus Road.

According to court documents, McGinty told investigators that he had been attempting to exit the freeway at Cactus Road when the other driver refused to let him merge. He claimed the other motorist then cut in front of his vehicle, pulled over and forced him to stop abruptly. The other man allegedly got out of his car and approached McGinty, repeatedly telling him to get out. McGinty said he warned the man that he did not want trouble while holding his pistol against his chest.

The confrontation turned deadly when the victim allegedly moved toward McGinty’s vehicle and appeared to be preparing to punch its window. McGinty admitted firing at him, telling investigators that he shot once and then fired again when the man turned back toward him. He also reportedly said his pistol malfunctioned after the first shot, forcing him to remove a screw from the weapon’s suppressor before he could fire again. The victim, who police said did not appear to be armed, was struck in the chest and back.

After the shooting, McGinty called 911 and claimed he had acted in self-defense. During the call, he reportedly described the other driver as someone who had been “road raging” and said he had to defend himself with his pistol. He also told the dispatcher that the victim did not appear to have a weapon. When officers arrived, they found McGinty waiting at the scene and took him into custody. The injured driver was rushed to a nearby hospital but later died.

However, investigators say traffic-camera footage did not support claims of aggressive driving by either motorist. Police also reportedly found no broken glass or visible damage to either vehicle. Those details could become important as authorities examine McGinty’s account and his claim of self-defense. He was booked into the Maricopa County Jail on suspicion of second-degree murder, with bond set at $1 million. The victim’s identity had not been publicly released in the reports available at the time of publication.

A dispute over a highway merge has now become a fatal criminal investigation, raising serious questions about how quickly an everyday traffic disagreement can spiral into violence. McGinty has acknowledged shooting the other driver but maintains that he was defending himself. Whether that claim can be supported by the evidence will be central to the case as prosecutors review the investigation.

Source: Law&Crime