A friend says 15-year-old murder suspect Alyssa Bustamante mentioned in January that she wondered what it would be like to kill someone.
Jennifer Meyer told St. Louis TV station KMOV that Bustamante made the comment during a birthday party.
Meyer says she thought Bustamante said it because she was mad at a friend but did not believe she would kill someone.
Bustamante is accused of killing a 9-year-old neighbor, Elizabeth Olten, on Oct. 21.
Authorities say Bustamante wanted to know what it felt like to kill someone.
They say Bustamante confessed and led them to Elizabeth's body in a wooded area.
Bustamante has been indicted as an adult on charges of first-degree murder and armed criminal action.
Information from: KMOV-TV, http://www.kmov.com