Deep Dive
Why did the investigation of the 1998 Inner Mongolia case take 20 years to solve?
The investigation took 20 years due to the lack of advanced DNA technology at the time, the absence of a national DNA database, and the complexity of the crime scene. Despite extensive efforts by multiple generations of police officers, it wasn't until 2018, when DNA technology and databases had significantly advanced, that the DNA from the crime scene matched with a deceased man's DNA, leading to the identification of the killer.
What were the key findings at the crime scene of the 1998 Inner Mongolia case?
Key findings included three female victims, one of whom was a child, all bound with thin wires. The adult females were stabbed to death, while the child was drowned. A water cup on the dining table suggested the killer was possibly a guest. Blood footprints and splatter patterns indicated the killer injured his right hand during the struggle. The absence of the knife used in the crime suggested it was taken away by the killer.
How was the suspect in the 1998 Inner Mongolia case finally identified?
The suspect was identified in 2018 when DNA from the crime scene matched with the DNA of an unidentified male corpse found in 2011. This corpse's DNA had a connection to the crime scene DNA, leading investigators to focus on a specific family in the region. Eventually, DNA testing confirmed that one of the family members, Li Moucheng, was the killer.
What were the similarities between the 1999 and 2015 cases in Hubei Province?
Both cases involved female victims who were attacked and dismembered in rural areas at night. The 1999 case involved a 13-year-old girl, Hui Shuangshuang, while the 2015 case involved a 43-year-old woman, Dong Qingzhi. Both victims were found near their homes, and the killer in both cases demonstrated a high level of skill in dismembering bodies, suggesting possible medical or butchering experience.
What led to the breakthrough in the 2015 Hubei Province case?
The breakthrough came from surveillance footage that captured a motorcycle rider following the victim, Dong Qingzhi, closely. This led investigators to narrow down suspects based on the motorcycle type and the rider's physical characteristics. Additionally, a pink mobile phone found at the suspect's home, which belonged to Dong Qingzhi, provided crucial evidence linking Liu Yacheng to the crime.
- 1998年9月2日，内蒙古鄂尔多斯市发生一起三名女性遇害案。
- 凶手劫财杀人，手段残忍，其中一名受害者为8岁女童。
- 案件侦破历经20年，最终通过DNA比对技术锁定凶手李某成。
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