Tongues are supposed to heal people not to kill people according to you, saying your tongues are effective and someone dies doesn't even sound right. Still fake- a muslim/an atheist/a hindu would say such a story and claim their god did it.
Jer 31:
31 Behold, the days come, said the LORD, that I will make a new covenant with the house of Israel, and with the house of Judah:
32Not according to the covenant that I made with their fathers in the day that I took them by the hand to bring them out of the land of Egypt; which my covenant they broke, although I was an husband to them, said the LORD:
33But this shall be the covenant that I will make with the house of Israel; After those days, said the LORD, I will put my law in their inward parts, and write it in their hearts; and will be their God, and they shall be my people.
34And they shall teach no more every man his neighbor, and every man his brother, saying, Know the LORD: for they shall all know me, from the least of them to the greatest of them, said the LORD: for I will forgive their iniquity, and I will remember their sin no more.