-Las Vegas, NV. -July 21, 2023. On July 21, 2023, at approximately 8:55 a.m., a woman called 911 and stated her brother, later identified as 35-year-old Dusty Porter, was acting erratic, and following her from room to room, armed with a knife. The female informed the call taker the two had been arguing and Porter was refusing to allow her to leave the residence located in the 2100 block of North Valley Drive. The female said she had locked herself in a bathroom away from Porter. Patrol officers arrived in the area and set-up a perimeter around the residence. The officers were able to establish dialog with Porter, who they could see through windows, and saw that Porter was armed with a knife. Porter refused to exit the house and repeatedly stated officers were going to have to kill him. For several minutes, officers continued to try and de-escalate the situation, when the sister started to scream from inside the house. Officers made an emergency entry. They found a locked bathroom door and could still hear the sister screaming. Officer Vladimir Butler the observe Porter with a knife which prompted the officer to discharge his firearm. Porter was struck one time. Officers were able to take Porter into custody and provided him immediate medical attention from medical personnel on scene. He was transported to UMC where he remains.