1.案例资料1.1简要案情2009年5月21日22时许,我市某县公安局110报称:杨某(女,19岁,该县高二在校学生)在离城南镇胆源村杨屋组三、四百米远的路边荒田里被人杀害。1.2现场勘验中心现场位于城南镇胆源村杨屋组村外小路路坎下的荒田里。尸体东侧坎上是小路,荒田距路面2.1m,小路往? 1. Case Information 1.1 Brief Case May 21, 2009 22 am, a county public security bureau 110 reported: Yang (female, 19 years old, the county high school students in the school) Housing group three or four hundred meters away from the roadside barren was killed. 1.2 Site Investigation Center site is located in Chengnan Town, Ganyuancun Yangwu Village Road outside the small ridge under the barren fields. The body of the east ridge is a small road, pavement from the pavement 2.1m, the path to?