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Santa Cruz County Sheriff Jim Hart released body camera video Monday showing an officer-involved shooting that resulted in the death of 15-year-old Luke Smith. The Aptos High School sophomore was fatally shot by deputy Chris Vigil on Saturday around 3 a.m. while the teen was armed with a knife, high on LSD, and struggling with a K-9. WARNING, GRAPHIC CONTENT: KSBW posted the complete body camera video here The video is heart-wrenching. "Everyone loses in cases like this," Hart said. "This was a very unique, difficult, upsetting situation. It's hard for me to watch this video. Luke Smith was a great kid. He was well liked by everyone." The video shows a dozen non-lethal 40 mm sponge rounds and Tasers having no effect on Smith. Even when the police dog bit onto Smith's right arm, the teen was able to shake the dog off without losing his grip on the knife, Hart said. Vigil fatally shot Smith once in the chest with an AR15 rifle while Smith was swinging his knife at the dog and Watsonville police K-9's handler. VIDEO: 911 calls made by stabbing victims PHOTOS: Aptos High student killed in officer-involved shooting Police officers, deputies, and paramedics were attempting to keep Smith alive with emergency medical aid when he died at the scene. Deputies were called to Smith's house on the 800 block of Amesti Road outside Watsonville because the teen stabbed his father and uncle. "He just stabbed me in the heart. My nephew. Hurry please hurry. I'm bleeding out," the uncle told 911 dispatchers. MORE: Investigators explain body camera video The popular Aptos High student took LSD with a friend earlier that night, Hart said. The friend told investigators that Smith took a larger dose than he did. When Smith became angry from the drug's influence, the friend left. Smith attacked his uncle and father about 10 minutes later in a stairwell, and they suffered life-threatening injuries. Hart said deputies used "everything in our toolbelt" to prevent the situation from escalating. Smith was hiding when deputies arrived, and he emerged to climb on top of a fire engine, Hart said. Deputies knew Smith was on LSD and engaged in a "long dialogue" with the teen. Vigil's voice -- recorded by his own body camera -- is noticeably calm and empathetic as he talked with Smith. "LSD is a tough thing, because it's hard to differentiate between what's real and what's not," Vigil told Smith while attempting to calm the teen down and coax him into dropping the knife. "Put the knife down buddy." Hart vowed the investigation into the officer-involved shooting would be transparent. He released the body camera footage as part of his promise to uphold 21st Century Policing, a nationwide police reform initiative. "We are public officers. It was a promise I made when we transitioned to 21st Century Policing and purchased the body cameras," Hart said. The sheriff said he is confident his deputies acted properly during a "chaotic," "highly tense situation." Smith's girlfriend, Celine Rivera, and sister, Savannah Smith, said the boy who loved surfing and skating was acting dramatically out of character while under the influence of LSD. Savannah Smith said her younger brother had never been violent toward anyone in the past, even while he experimented with various recreational drugs. She believes he took a "bad batch of LSD." Just one day after the officer-involved shooting, deputies raided a Santa Cruz house and arrested four people who they suspect sold the 15-year-old boy LSD. The four people arrested were identified as: Nathaniel Allen Trecasco, 28, Bradley Allen Hodge, 24, Thomas Nicholas Negron, 20, and Taylor Leigh Filson, 28. Hart said Trecasco was in a coma when deputies arrested him, likely from a drug overdose. The accused drug dealer remained in a coma at a hospital on Tuesday. Filson, Negron, and Hodge were booked into the Santa Cruz County Jail on charges of possessing drugs for sale and manufacturing drugs. Savannah Smith wrote on Facebook, "There is a bad batch of LSD circulating throughout the area. This batch of LSD made my brother extremely violent and ended with the police shooting him. Nothing could stop him from what he was doing, because he wasn't himself; this drug brought out some form of evil in him. Luke Smith was, and still is, the funniest, happiest, most loved kid in the county. He brought a smile to everyone's face and emitted nothing but good vibes. He could befriend anyone, which he often did. No matter how experienced you are, you cannot control substances; at a certain point, substances control you." Toxicology tests will take several weeks to complete. The stabbing victims are expected to survive. Grief counselors were available on campus at Aptos High School Monday. Hart urged teenagers and parents to take the dangers of drugs seriously. "We are all one bad night away from something tragic happening. Some kids are going to take drugs. And this community is fairly permissive on that. But they need to know, they don't really know what they're taking," Hart said.