Details in last night’s fatal collision on Bond Road near Castle Rock are coming slowly, but authorities are releasing the name of the girl that was killed. The County Coroner identifies the victim as Harlie J. DesArmo, 15, of Castle Rock, and it’s reported that her 18 year-old sister, Courtney, was seriously injured in the crash. Details on exactly what happened are still being investigated, but the Sheriff’s Office is confirmed that the two girls were hit around 10 pm last night, by a vehicle driven by a 22 year-old Castle Rock man as the girls were walking in the 400 block of Bond Road. At this point, they’re saying that the driver is being completely cooperative with the investigation, but the cause of the collision hasn’t yet been disclosed. The investigation is continuing, and additional details should be released later.