The case of the Barefoot Burglar

Name	Evidence	Clues
Peg the legSimple loop 22.86nm	Has the salt that was left has chocolate chunks in coke	Carries salt everywhere she goes
Jack the jock - whorl 29.718cm	Eats chocolate chuck has same looking footprint and eating chocolate making his hands sticky.	eats chocolate chunks
Dan the man - Whorl  26.5176cm	Same foot as burglar. because of his fingerprint has chocolate chunks	Same foot print as burglar and finger.
Lou Lou - Arch 24.23cm	Always barefeet and is clumsy. knocked the paint	Clumsy and barefoot

I think its all of them.

White powder test

White powder text

Equipment:

Baking Soda
Cornflour
Sugar
Salt
Iodine
Vinegar
Magnifying glass
Eyedrop
Black card
Tea spoon / stick

Method: 

1. Place one-fourth teaspoon (1 ml) of the four white powders on a sheet of black construction paper. Label the powders with your pen.
2. Study the powders with the magnifying glass. Examine what each powder looks like. How would you describe the powder's shape. Does it have large or small grains? Your observations should be written in the appearance column of the chart.
3. Examine the powders further by rubbing each powder between your fingers. Describe how each powder feels in the Texture column of the chart.
4. Determine if there is a smell to any of the powders. Record your findings in the Smell column of the chart.
5. Take the eyedropper and place a drop of water on each individual powder. Examine what happens? Do the powders dissolve? Is there a reaction? Write your observations in the Reaction to Water column.
6. Place one-half teaspoon (2ml) of each powder in a separate jar. Add 2 drops of iodine to each jar using the eyedropper. Record what happens in the Reaction to Iodine column. Iodine should be handled with care.

A	Baking Soda- It turned a orange and yellow colour - kind of dissolved - Fine grains
B	Cornflour- It turns to like oobleck - Has fine grains - Turned black
C	Salt - Turned black - Big grains - Dosent dissvole - Tunes orange when you put iodine and when mixs turns black
D	Sugar - Is orange when iodine is put on then turns blavck when mixs -

When the powders we analysed  they found to have different properties. powder D had the largest granules. when iodine was mixed in with B it turned into black oobleck. None of the powders had a smell. 

Forgery

1. Sign your name on a sheet of writing paper, and get someone else to try to copy it.
2. Place the tracing paper over both signatures, and make a dot at the top point of each letter – for both signatures
3. Join up the dots for both signatures to get two zigzag lines across the signatures. Are the lines the same?

4. Put some fresh tracing paper over both signatures.
5. Put a dot at the bottom of each letter.
6. Join up the dots to make zig zag lines. Are the lines the same

7. Put a fresh piece of tracing paper over both signatures.
8. Mark a vertical line down through the middle of each letter (using a ruler), slanting it in the same direction as
the letter.
9. Compare the set of lines for both signatures. What do they tell you.