Simplify the following text for a Grade 9 native English-speaking person.
Original: Sylvia Marie Likens ( January 3 , 1949 - October 26 , 1965 ) was an American murder victim from Indiana .
Simplified: Sylvia Likens ( January 1 , 1949 - October 26 , 1965 ) was a 16-year-old murder victim from Indiana .