who killed zach on days of our lives
Chelsea Brady As Abby Deveraux's best friend, Chelsea is a bad influence. She encourages Abby to smoke, drink, and lie often to her mother. She also has a few driving incidents, including having her license revoked. Of course, the most serious accident results in the death of Zack Brady — her half-brother, whom she hits while she is text messaging and driving simultaneously, thus incurring the wrath of Hope Brady and half-brother Shawn Brady.[7]