On Oct. 28, 2021, the Sioux Falls Police Department responded to an area hospital for three individuals, a 6-year-old child, a mother and a grandfather, who were stabbed and had life-threatening injuries. The child had suffered multiple stab wounds and a slit to the throat. Officers on scene ascertained that the suspect was the father of the 6-year-old. SWAT and negotiators arrived at the location where the suspect was located and discovered he was armed with a large hunting knife and refused to exit the residence. Due to the severity of the incident, SWAT was detailed to the scene to take over the incident. Throughout the course of the incident several situations were dealt with including a cut gas line to the home and an odor of natural gas outside the home and in the surrounding area. Concerned for the safety of law enforcement/fire personnel as well as neighbors, it was important to clear the structure as quickly as possible. This debrief will discuss the tactics used to resolve this incident, including use of multiple 40mm BIP rounds and a K9.