The Watchtower society has a tract record of changing the bible to fit there doctrine. They have changed it so many times, each time after they found a verse that contradicts there doctrines.
Quote from “Truth In Translation - Accuracy and Bias In English Translations of the New Testament” - Jason David BeDuhn - Associate Professor of Relgious Studies - B.A. University of Illinois, M.T.S. Harvard Divinity School, Ph.D. Indiana University
"People are quick to charge inaccuracy and bias in someone else’s Bible. On what basis do they make such charges? Charges of inaccuracy and bias are based upon the fact that a translation has deviated from some form of what the translation should be. So what is the norm? It seems that for many the norm is the King James Version of the Bible. If a new translation varies very far from that norm, it is criticized as inaccurate and erroneous, and its translators are suspected of ulterior motives in producing a different translation, a hidden bias that perverts the truth of the King James version. You hear it all the time: someone has “changed” the Bible by offering a new translation. The changes from the standard of the KJV, which was, after all, presented as the “standard” translation. If a translation differs from the “standard”, clearly it must be wrong.
Unfortunately, this view of things is based on ignorance of the most basic facts about the Bible…
In order to have any ability to make a judgment about the accuracy of the translation of the New Testament from its original Greek into modern English, you have to know how to read Greek, and the particular kind of Greek in which the New Testament was originally written… yet, amazingly, the majority of individuals who publicly pass judgment on Bible translations… do not know how to read Greek.
The obvious question to be asked here it is: then how can they tell what is a good translation and what is not? The fact is that they cannot. Their opinions are based not on the accuracy of translating Greek words into English words, but on the agreements of the final product with their own beliefs about what the Bible must say…
Since the Jehovah’s Witnesses are well outside of the Christian mainstream, the impression among the general public, and among several important Bible scholars, is that the differences of the New World translation from other translations are due to the peculiar ideas and biases of the witnesses. ** I have identified a handful of examples of bias in the New World translation, where in my opinion accuracy was impaired by the commitments of the translators. But the biases of the New World translators do not account for most of the differences of the New World translation from the other translations. Most of the differences are due to the greater accuracy of the New World Translation **as a literal, conservative translation of the original expressions of the New Testament writers…
While it is difficult to quantify this sort of analysis, it can be said that
the New World Translation emerges as the most accurate of the translations compared."