I believe that there are many different sides of the truth. I often ask myself; "What is the whole truth?" While I have my own versions of the truth about everything, there are many different interpretations of the truth to be made from all the parties involved. Say there was a murder, and the victim had his own version of what happened. We will now never know the truth from his side, but we must fill in the gaps with what we are left with.
The truth is usually incomplete because of such conclusions, but it is necessary that we piece together what is there to get the entirety. The truth is hard to tell, but easy to understand once all the parties are on the same page. The problem with reconstructing the truth is that there may be biases towards one side or the other, or there may be enhancements of the perceived truth. What we must all do in these cases is trust our judgment, this is what the justice system is for.
Sometimes, the justice system can reach conclusions that we believe to be unfair, but these conclusions are based on the truths that were reconstructed from the abstractions. If no decisive conclusion can be made from the evidence presented, then the judgement of the system is all that is left to deliver the final say. If you believe you know the truth well enough, be wary, as your truth is subject to change with the inclusion of the testimony of the holders of further truths.
Is there really one truth? No. The truth is told through perception, and it is our duty to interpret these perceptions to the best of our ability and to reach our own conclusions.