Erandy Elizabeth Gutierrez, 16, allegedly stabbed Anel Baez, also 16, at Baez's Guamúchil, Mexico home on March 19. Baez died in the attack, and Gutierrez was arrested 3 days later at her former friend's funeral.
Baez had wanted Gutierrez to come over so the two could patch things up, but when Gutierrez asked if she could use the bathroom, she allegedly grabbed a knife from the kitchen instead.
Police are likely to charge Gutierrez with murder later this week. If she's prosecuted as a juvenile, she'll face 7 years in prison.