Not those kind of impressions. I can do a Tommy Cooper, just like that!
I guess you’re wondering who Tommy Cooper is now. Google him and when you see a man wearing a fez you have your guy.
Anyway, time to start the third week of the A to Z Challenge. This is the halfway point and another crime post.
This time onto Marks and Impressions or indentations. I’ve already posted about the most common mark left, which are our fingerprints. What else could you use to help your Detective?
- 2D impressions – Think of marks on your nice clean kitchen floor. Freshly cleaned and someone walks on it. You’ll see a pattern of your shoe on the surface. Same if your naughty person walked through blood or a pool of grease as they stole your Main Protagonist’s car. There are databases of shoe prints these days to help your Detective.
- 3D impressions – Think of your naughty person standing on soft ground. Maybe a freshly weeded flower bed, their feet sinking into the mud. Same would apply to footsteps on sand or in snow or any soft surface. You Crime Scene Investigator is going to want to take a cast impression of the print to use for a comparison later.
- Did you know there are even forensic odontologists who can be brought in to match human bite marks on your victim? You might want to think about my post on DNA for this one as saliva is likely to be present on any bite marks.
- How did your criminal break into that garage? Did they use some sort of tool? Then the tool is likely to have left a mark. And, that mark could be traceable. Maybe they used Uncle Ernie’s spanner, pliers, wrench. Under a microscope these marks could be used to point the finger. Poor old Uncle Ernie. Arrest him!
Tyre Marks are like fingerprints in you can have the same three types:
- Latent – invisible to the naked eye, but on smooth surfaces the marks can be enhanced;
- Visible – Imagine if your assailant screeches their getaway vehicle through a mud pool, or paint or another visible agent;
- Plastic – Where could your vehicle leave 3D impressions. Again soft earth and snow would leave something to be cast.
So, even if you’re not writing a murder mystery, you can still use marks and impressions to help inform your plot.
Happy crime writing!
This is my M post for the A to Z Blogging Challenge. A list of all my A to Z Blogging Challenge posts are to be found here.
My photographs for today are of our current cat, Munchie.