A quiet Sunday night in Southwest Sioux Falls quickly changed as police responded to a stabbing at the 9400 Block of West Karmya Circle on February 14, 2016 at approximately 9:30 PM.  The suspect description that was announced on the Sioux Falls Police scanner alerted authorities to a black male, 19 or 20 years old, wearing a blue or black hoodie.  The knife was described as small and the suspect fled on foot.