Fast because has details to trace mar. If like you and me, just a normal people, with very little thing to be traced, then will be difficult to start investigate. The most important thing is to find out those suspected person with valid motive. Then only can investigate or do something. If like you and me, most of the time can only be killed due to accident, robbing, women and etc related. In this case, they have the data that consist of the amount of cash, purpose, direction and etc, the primary suspect was so obvious, the police force can pin point investigate. Maybe also didn't use the yellow page booklet from the room in order to let the suspect speak out faster.
The serial killer is so clever. He thought he can get away if the body not found (loop holes of the law). But I swear if I have a chance to see him on the street, sure I'll fcking whack kaw him until I cannot move anymore. This type of rubbish should be burnt or buried and not those innocent people.
I'm going to get crazy on the murdering case nowadays. RM4m murder, RM10 also murder. KNN, WTF is going wrong with this country?