一天凌晨,北票市城关派出所辖区发生一起重大抢劫杀人案.案情是：途经北票的沈阳 ──凌源长途客车在北票站前旅社门前停车时，两人上车抢劫财物，并将一名反抗的旅客剌死。在调查取证时，一乘客提供：行抢时，作案人中一个对另一个喊了一声“老五”。根据这一线索，办案人员首 One day early in the year, a major robbery and murder occurred in the area under the police station of Beipiao Chengguan. The case was: Shenyang via Shenyang North Railway - Lingyuan long-distance bus was parked in front of the Beixiao Station in front of the hotel and the property was looted and robbed A revolting traveler assassinated. When investigating and obtaining evidence, a passenger provides: When robbing a robber, one of the perpetrators shouts “Lao Wu” to another. According to this clue, the first case investigators