The crime scene is in the food prep area of the Saddleback Cafeteria.  We have several samples taken from the crime scene.  The following is a list of the potential unknowns.  You have analyzed your unknown.  Your job is to determine from the tests you have made and a bit of detective work on the composition of the possible unknowns what you have.  Please write a single paragraph explaining how you came to your conclusion.  Here are the possible unknowns:

Mayonnaise

Cream Cheese

Tomato Soup

Blood

Semen

Fruit Punch

Potato Soup

Clam Chowder