What are some key things people need to know about how to handle evidence related to different types of disputes (civil, criminal, private) ? What makes this difficult at times?

Evidence makes up for the baseline information needed for investigation. Evidence must be noted, gathered, documented, protected, analyzed and presented in manners acceptable in the court of law.

Explanation:

Evidence ensures that an argument can be built on a body of witness to support claim for or against an issue or challenge. Evidence must be noted, gathered, documented, protected, analyzed and presented in manners acceptable in the court of law. It is often difficult at times, especially in the process of gathering such evidences as a result of distortion by individuals concerned with delivering the evidence, or as a result of challenges in the way of getting them.