Man injured, woman detained after stabbing at Walmart in north Houston, HPD saysA video obtained by Eyewitness News shows the moments after a stabbing inside a Walmart in north Houston and the paramedics' response. A video obtained by Eyewitness News shows the moments after a stabbing inside a Walmart in north Houston and the paramedics' response. A video obtained by Eyewitness News shows the moments after a stabbing inside a Walmart in north Houston and the paramedics' response. A video obtained by Eyewitness News shows the moments after a stabbing inside a Walmart in north Houston and the paramedics' response. HOUSTON, Texas (KTRK) -- A man was injured, and a woman was detained after a reported stabbing at a Walmart store in north Houston, according to the Houston Police Department.