The Pensacola Police Department is investigating a stabbing death that happened early yesterday afternoon. Investigating officers say a disagreement between two brothers turned violent and ended with one of them being fatally stabbed and the other arrested. 15-year-old Denzel Williams, of 715 North H St., Pensacola, has been charged with the second-degree murder of his brother – 19-year-old Malik – who died after he was stabbed twice. Denzel Williams was taken into custody at the scene; Malik Williams died a short time later at a local hospital.