Now You Know Crime Scenes: The Little Book of Answers
By Doug Lennox
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About this ebook
With hit cop TV dramas like the various CSI and Law and Order shows, Bones and Criminal Minds. everybody seems to think they’re a forensics expert. But what do we really know? Now, with Now You Know Crime Scenes, we can all get the dope on:
How long does it really take to analyze a DNA sample?
Who started the first forensics laboratory?
Who invented criminal profiling?
How do you do a walk-through?
Doug Lennox
Doug Lennox was an internationally acclaimed broadcaster, a veteran character actor, a commercial voice artist, and a bestselling author. He has appeared in more than 60 films and television features, including X-Men, Police Academy, Lonesome Dove, and Against the Ropes, and shared screen time with Meg Ryan, Hugh Jackman, Burt Reynolds, Holly Hunter, Eric McCormack, Gary Oldman, and a myriad of others.
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Now You Know Crime Scenes - Doug Lennox
Legalese
PREFACE
We live in a country that has chosen to assume that a person accused of a crime is innocent until guilt is proved beyond a reasonable doubt. Most of us agree that this is honourable and right, but it does place a huge responsibility upon police and forensic investigators involved in the investigation of a crime. To achieve the high standard of proof required for a conviction, these men and women must always remember that their actions on the job have to withstand critical examination in a court of law.
This book answers questions about crime scene investigation, provides some historical context, and offers accounts of various crimes to illustrate how good investigative techniques have worked in practice.
Research has gone into every question with the aim of entertaining readers of all ages. I learned a great deal while working on this book. I hope you will, too.
CRIME SCENE RESPONSE
How did 911 get started?
Canada began to provide 911 services in 1972. AT&T introduced the service in the United States in 1968. Britain was well ahead. They began a 999 service in 1937 following a terrible fire in London in 1935 that led to the deaths of five people.
What happens when you call 911?
Dispatch asks whether you need police, fire department, ambulance, or all the above. They try to get your location, particularly if you are on a cellphone and your location can’t be pinpointed automatically. You will have to describe the problem, say who is hurt, and how badly. If it is safe for you to keep talking, more questions will seek to calm you or help the emergency workers prepare for their arrival at the scene.
What is the responding officer’s responsibility at the crime scene?
A preliminary investigation begins when police officers are dispatched on a call. On the way, they plan their response. At the crime scene, they start by helping the injured, chasing suspects, gathering witnesses, trying to determine if a crime was actually committed, and requesting appropriate backup from headquarters. As soon as possible, they secure the crime scene and locate or collect evidence. They take good notes throughout. Although the reality of most crime scenes makes achieving all these objectives difficult, the better this work is done, the better the chance the criminals will be caught and convicted.
What is a crime scene?
The preliminary investigating officer makes the first attempt at defining the crime scene by running tape around its perimeter to stop people removing or contaminating evidence. Crime scenes may be as small as the room of a house or as large as a park, and some crimes may have several crime scenes. As more is learned about the crime, the crime scene may be enlarged or reduced.
Do the police draw chalk lines around a body?
Lines, tape, paint, and ropes have all been used to mark the location of a body, especially if it was going to be moved. However, the practice is risky because of the chance of evidence contamination. Often the coordinates of the body are established by measuring to it from known fixed points and by taking photographs.
What are solvability factors?
Police resources are spread thin, so many crimes get little attention, and some get almost none at all. One factor used to determine whether police will spend time on a case is its solvability as determined by the preliminary investigating officer, the one who responded to the call. Crimes become solvable when there are witnesses, good information about the suspect, good physical evidence, and identifiable property. If these factors are not present, the case will probably be closed or suspended.
Why is it important for investigators to take notes?
Memories are unreliable, more and more so as time passes. That is why courts prefer physical evidence or testimony supported by notes. Good note taking can save constables and detectives embarrassment in court. As well as containing names of victims, witnesses, and suspects, good notes describe important details of the crime scene, such as bullet holes or broken lamps, the locations of key pieces of evidence, and the things people say and their behaviour