Jacksonville teen Serenity Mallett missing; six, including two teens, arrested in separate murder case.

14-year-old Serenity Mallett from Jacksonville, FL, is missing after not returning home from school. Last seen by friends near Dunn Avenue at 4:30 PM, she is described as 5'2", 125 pounds, with brown eyes and black hair in a ponytail. She was wearing a grey shirt, black pants, pink socks, and pink shoes. Authorities ask anyone with information to call (904) 630-0500. Separately, six individuals, including two teens, were arrested in connection with the murder of 7-year-old Breon Allen, linked to gang violence in the area.