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Man arrested in Mattawa triple homicide

J. Guadalupe Martinez has been arrested as a person of interest in a triple homicide Monday, Dec. 14, 2009, near Mattawa, Wash. (Courtesy of Grant County Sheriff's Office)
Associated Press
J. Guadalupe Martinez has been arrested as a person of interest in a triple homicide Monday, Dec. 14, 2009, near Mattawa, Wash. (Courtesy of Grant County Sheriff's Office)
MATTAWA, Wash. — A 24-year-old Mattawa resident has been arrested in Sunnyside in connection with a triple homicide. Sunnyside police arrested J. Guadalupe Martinez on Tuesday evening at a restaurant while investigating a convenience store robbery. Several other law enforcement agencies assisted with the arrest, which was announced by the Sunnyside Police Department in a statement Wednesday. Grant County Undersheriff John Turley says the coroner is working to identify the victims and contact their families.