In our series of our top stories of four part-series of the top stories of 2020 is the arrest of Nicole Packer, 35, of Morongo Valley, who was arrested nearly 18 months after a crash that killed two teenagers. Prosecutors say that Packer was driving under the influence and at a high rate of speed when her 2018 white Ford Fiesta crashed into a Toyota Prius just west of Rosella Drive on Highway 62 on June 12, 2019. Hart Campbell, 14, and Ruby Campbell,17, both of Los Angeles, died at local hospitals a few hours later. Packer was arrested December 2 and charged with two counts of murder, DUI causing injury, driving with a suspended license, and speeding while DUI. Nicole Packer pleaded not guilty to all charges December 22. Managing editor Tami Roleff has more information about a murder in Joshua Tree that stunned local residents…