__ are collected by crime scene investigators or confiscated by law enforcement. Drugs Microcrystaline Reagents Presumptive tests

## Step 1<br />The problem is asking us to identify what is collected by crime scene investigators or confiscated by law enforcement. The options provided are Drugs, Microcrystaline, Reagents, and Presumptive tests.<br /><br />## Step 2<br />We need to consider the context of the problem. Crime scene investigators and law enforcement officers are involved in the investigation of crimes. They collect evidence that can be used to identify the perpetrator and understand the nature of the crime.<br /><br />## Step 3<br />Among the options, Drugs are the most likely to be collected by crime scene investigators or confiscated by law enforcement. This is because drugs are often involved in criminal activities and can provide crucial evidence in a criminal investigation.<br /><br />## Step 4<br />The other options, Microcrystaline, Reagents, and Presumptive tests, are not typically collected by crime scene investigators or confiscated by law enforcement. These are more likely to be used in a laboratory setting for testing and analysis, rather than being collected as evidence.