Narrator: The following morning, Logan and Grant were sitting in Logan`s office on the second floor. Logan still had red marks around her wrists where she had been tied up. There was a knock and the door opened. It was Helen Robertson.
Helen Robertson: Hi Jenny. I heard you were back at work already.....How are you?
Logan: Not too bad, thanks...
Helen Robertson: I was just passing, and I thought you`d like to know that the insulation material we found on the two murdered women is a match with the material found in the roof space at Karen Ramsay`s flat.
Logan: Good, it all helps to make sure we have the right person and that she goes to prison.
Helen Robertson: Better still, they found some more material in the roof space at Ramsay`s flat which is an exact match with Fran Stewart`s skirt.
Logan: Excellent...
Helen Robertson: So what was it all about? ....Why did she do it?
Logan: Logan sat back in her chair holding a cup of coffee....... It seems that it was all to do with research in the Computer Science department at the university, I don`t understand it completely, but Kenneth Henderson explained the main ideas to me. Essentially, it`s like this: two of the areas of research at the university are new wireless technology and computer security, and one of the main problems with wireless technology is security. For example, as I understand it, if I have the right equipment, I can park outside your office, log on to your computer, and then help myself to information without you knowing anything about it.`
Helen Robertson: So why don`t computer scientists just help each other find the answer to the problem?
Logan: Well, apparently some researchers get very worried about other people stealing their ideas, so they keep all their research very secret. However, there were a few people at the university who knew what all the researchers were doing....
Helen Robertson:........and Karen Ramsay was one of them....
Logan: Exactly, she saw how two different pieces of research could work together to provide an answer - a brilliant idea that would not only get her a PhD but also make her rich. The problem was the two people who had actually done the research.
Helen Robertson:......So she decided to kill them...
Logan: Right again, she looked across at Grant for him to finish the story for Helen Robertson.
Sergeant Grant: She knew both the women, so it was easy enough to offer them a lift. Presumably she followed them, waiting for a suitable opportunity. Late at night both of them would probably have been happy to accept the offer of a lift from someone they knew. After that it was easy.
There was silence in the room as they thought about what Ramsay had done. There was another knock at the door. Sergeant Graham looked into the room.
Sergeant Graham: Sorry to interrupt you, but do you still want to see Billy Marr? He`s just been brought in downstairs.
Logan: To Grant`s surprise....Actually, yes. Bring him up.
Helen Robertson:......I`ll leave....
Logan: No, no, Helen, wait. Come and sit down......
Logan pointed to a chair beside her desk. Robertson sat down, looking a little confused. As a police doctor, she wasn`t usually present at interviews.
A few minutes later Sergeant Graham showed Billy Marr into the room.
Logan: Sit down, Billy, now then, I want you to tell me exactly what happened two weeks ago when you found the woman`s body on Calton Hill.
Logan: Marr was about to open his mouth to speak, when Logan said, .....and no, don`t tell me you killed her because we know who killed her and it wasn`t you. Just tell me what you saw and did.
Billy Marr: Well, I was up in the park there on Wednesday night -well, Thursday morning, like I told you before.
Logan: What time?
Billy Marr: I guess about two or three in the morning. I`d been out for a meal at an Indian restaurant. I`d had a few drinks and I was sitting against the wall close to the road and then I fell asleep. When I woke up,