The driver who killed Treat Williams has pled guilty to negligent driving. Following his guilty plea, Ryan Koss, 35, received a one-year deferred sentence and will be placed on probation. His licence will be revoked for one year, and he will be required to attend a community restorative justice programme, according to The Hollywood Reporter. Koss, who knew Williams, 71, said in court: “I’m here to apologise and take responsibility for this tragic accident. And I hope this moment can bring some resolution to anyone impacted by this tragedy, especially to Pam, Gill and Ellie, I’m so sorry.” Acco…