Jurors found Jessica Tata guilty of one count of felony murder after deliberating for about six hours over two days.
Prosecution witnesses told jurors that Tata was convicted of arson as a juvenile. Witnesses said Tata started two bathroom fires on the same day in 2002 at her suburban Houston high school. The then-ninth-grader pleaded guilty in juvenile court to at least one arson count and was given probation.
"She was a bad and evil person," said Robert Gex, who was the high school's assistant principal. He told jurors Tata was troublesome even before the fires.