1案件简介某年4月15日临晨12时,某市一辆出租车被两名男子抢劫,司机在被抢过程中受伤,后经抢救无效死亡。侦查人员在现场勘验过程中,发现出租车右后门内侧的门把手上(见图1)留有潜血指印2枚。当地技术人员对这两枚血手印采用了光检法和四甲基联苯胺显现法处理,均未显出手印纹线。 Brief introduction of a case On April 15, at 12 o’clock in the morning, a taxi in a city was robbed by two men and the driver was injured during the robbery and died after being rescued. Investigators at the scene of the inspection process, found inside the right rear door taxi door handle (see Figure 1) left two occult fingerprints. Local technicians treated the two blood fingerprints by photometric method and tetramethylbenzidine visualization method, all of which showed no fingerprint lines.