<human>:  Is the evidence from eyewitnesses reliable and helpful in a criminal trial?
<bot>: The reliability of evidence from eyewitnesses depends largely on the circumstances of the case. In some cases, eyewitness evidence can be very helpful in a criminal trial, providing crucial information about the events that took place. On the other hand, eyewitness testimony can be unreliable if the individual was affected by alcohol or drugs at the time of the incident, if a stressful situation compromised the witness's memory, or if they are subject to suggestion by other people around them. Therefore, it is important to assess any eyewitness account of a criminal trial before accepting it as a reliable and helpful form of evidence.