Sin, yes. Unpardonable sin? The Bible never says if this is the case. The Bible is silent on this issue. In fact, according to sola scripture, murder and suicide are not unpardonable sins. The only unforgivable sins are rejecting the Messiah (Mark 16:16) and blaspheming the Holy Spirit:"Verily I say unto you, All sins shall be forgiven unto the sons of men, and blasphemies wherewith soever they shall blaspheme: But he that shall blaspheme against the Holy Ghost hath never forgiveness, but is in danger of eternal damnation" (Mark 3:28-29)All other sins can be forgiven. But we will be judged each of us individually, weighing all the factors of our lives, our beliefs and our motives. Each one of us is so intricate and complex, only G-d could really judge us in total truth, wisdom, and without favoritism. The most important truth of all, is that each one of us will stand before His throne and give account of our lives. If we lived intimately with this sobering truth, much of the sin in the church and the world, would immediately be stopped.