Karen Perez, 15, begged for her life ‘I don’t want to die’ as boyfriend raped and strangled her

The harrowing last words of 9th grader lured out of school by 15-year-old boyfriend, the last person who saw her alife

He stuffed her body under kitchen sink before fleeing empty Houston apartment

The rape and strangulation ordeal was captured on cell phone video – recorded by suspect