I don't know if you are doing course work or not, but the thing is, real police work has little comparison with the CSI shows on TV.
First seldom do you have crime lab people in the field, many small departments don't even have crime lab people, the office on patrol or sometimes a dectitive takes all the evidence that is then mailed to the crime lab to be reviewed.
Also all of the CSI TV show tests costs 1000's and 1000's of dollars and seldom done in most cases
For my example, you are arresting someone for drugs, you just test the substance for drugs, if it is not drugs you care less what it is,
If this was a break in, seldom will a found substance even be tested, just not enough time and almost never enough money to do tests like that.
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