Clue to trace Adik Nurin Jazlin’s murderer!!
Mission Objective : To trace and identify Nurin Jazlin’s murderer/bag carrier Mobile Phone Number.
By Basteng
Step # 1: (CCTV)
Step # 1.a => Check and get CCTV Start Time (A) and CCTV End Time (B). This probably needs to include +- buffer time (say 5 minutes) because the CCTV time may not be too accurate.
Step # 1.b => Obtain CCTV Total long duration hours (X) [in seconds!] X=B (-) A.
Step # 2: ( Telecomunication information)
Step # 2.a Firstly, get information on CELL ID surrounding that area from each Telco (the nearest CELL ID area at kedai sukan where Nurin’s body was found).
Step # 2.b Get the list of readable CDR report (CDR Report #A) that match the CELL ID and TIME GIVEN (Step # 1.a) from each telco.
Step # 2.c The CDR report # B is produced by using the CDR report #A. The query is made by filtering and checking with CCTV long duration hours (Step # 1.b).
– From the CDR report #B, the police can identify what is the mobile phone number of the man who carried the bag which had Adik Nurin’s body by screening and filtering the A# and B#.
– Get profile for A# and B# from respective telco base on that date.
– Also, the history of the suspected profile would be found in the billing system regardless if he/she is a Post or Pre-paid customer. Thus, further analysis could be made by checking the SMS system or other call patterns.
– End result :- list of known persons of the suspect who made the call during that time and place and investigations can start from that.
*Note :
i) From CCTV, we saw how the man who talked through his hand phone while he carried the bag which had adik Nurin’s body. Therefore, we can get enough information by checking at Call Detail Records (CDR) information.
ii) In the telecommunication industry, they have a term which is called Global System Mobile (GSM) Cell ID. Cell ID is the smallest unit in the GSM technology.
For Adik Nurin’s case, we know the area where the phone call was made from. So, we just need to check and confirm with Telco operators (Maxis, Celcom and Digi) what is the CELL ID for Rumah kedai which adik Nurin’s body was found. For instance, the CELL ID for rumah kedai is configured as 1112.
iii) When a phone call is made, two parties are involved. The Caller (A Number) is the person who made a call. The Recipient (B Number) is the person who received the call.
As a result, at Telco operator switch (switch is the Maxis/Celcom/Digi system) side, the Call Details Records (CDR) which carry the phone number for A Number and B Number will be captured by the switch in order for it to be billed to the mobile customer.
For your information, below is the common field types for CDR description:
1. User identifier (i.e., Mobile telephone number)
2. Network identity (system identification number)
3. Terminal or mobile unit identity (electronic serial number)
4. Calling party telephone number (mobile)
5. Called party telephone number (mobile)
6. Start time or time of initiation of trigger event
7. End time
8. Call duration
9. Call record type
10. Serving cell site
iv) To execute and produce the above step/report, we need to get all Telco operators’ (Maxis/Digi/Celcom) billing department’s help.
v) : For your information, the government through MCMC has implemented the policy that all CDR information must be stored and kept for 7 years by Mobile Telco operators. Therefore, there will supposedly be no issue for Maxis/Digi/Celcom to assist and provide the police with all the request reports.
Conclusion:
I believe if the police or whichever team follows this clue properly, they would be able to catch that main suspect!
