Dr. Sue Jickells is doing research to learn how things criminals may touch, such as explosives, cigarettes, and drugs, can leave behind traces on the skin. When identified and studied, these trace substances could tell us much more about the lives of fingerprint donors than just their .

Identities

Explanation:

When studying about the explosives, cigarettes and drugs then they tend to trace the identities and lives of the people.

The finger prints of the criminals can tell us different things about their lifestyles. They can give us an idea that whether they already have a previous criminal record or not.

Touching anything that can leave a finger print on it which can be used used to reveal the identity of the person.