Bloodstained evidence must be accompanied by a whole-blood or _____ ____ sample. (Fill in the blank)

Bloodstained evidence must be accompanied by a whole-blood or _____ ____ sample.
 
  Fill in the blank(s) with the appropriate word(s).

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(Question #2) The _____ ____ ________ is a list of all people who came into possession of an item of evidence.
 
  Fill in the blank(s) with the appropriate word(s).

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(Question #3) Most attitudinal scales used in the social sciences and criminal justice are interval in nature.
 
  Indicate whether the statement is true or false

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(Question #4) The _____ of DNA can occur when items of evidence are incorrectly placed in contact with each other during packaging.
 
  Fill in the blank(s) with the appropriate word(s).