True bible translation?

OK first before I get into all of this iwant to apolize for spelling and grmmer errors and for this being so lengthy. I do believe in GOD FATHER SON and HOLY SPIRIT. now on to my qustions. how can I be sure that modern day bible translation are correct, and yes I even mean KJV. the reason i ask this is even though the bible is the word of GOD and insprirde by GOD, there change of words and meanings of words through out the time (example; thou shall not suffer a witch to live, is actualy thoushall not suffer a poisoner to live, so witch craft is actuully poisoncraft. also another example thou shall not kill actually means thuo shall not murder in cold blood) these are just faw examples. Now please do not get me wrong I do believe in the 'spirit' of the bible ateachings but I am trying to figure out the intentionaly corupted translations that is given by people who are afraid to give the true words of GOD to the people. there are so many things I could put in here to ask but I hope I am getting my question clear enough to get an answer back. Also if there is anyone out there that wants to have a more in depth explanation or dissussion about my question you can contact me at e201081@yahoo.com