Police: Texas teen kills mom, brother before killing himself
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Investigators are trying to determine why a Texas teenager fatally stabbed his younger brother and mother, who was a Dallas television personality, before mortally wounding himself.
Police in the Dallas suburb of Plano say 19-year old McCann Utu Jr. attacked his 45-year-old mother, Stacy Fawcett, and his 17-year-old brother early Friday before stabbing himself multiple times.
Authorities say he called 911 at some point and admitted to the killings.
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Police spokesman David Tilley said Monday that investigators are conducting interviews with family and friends who say Utu's disposition dramatically changed after suffering two concussions within a span of a few months.
A memorial service is planned for Tuesday.