"When You Kill Someone, His Blood Will Be On Your Head": How True Is This?

A friend told me that when you kill someone, either intentionally or mistakenly, that his blood will be on your head. According to her, the person's sin will now be added to your (the killer) sins, making him or her to go straight to heaven without questions.

An example is the recent killing of Eunice who was preaching the gospel on Abuja. Does it mean her Sins will now be added to the sons of the Muslim youths that killed her?

I find it hard to believe because if it's possible, i will just live as i like and do all the sinful things in life and ask Lalasticlala.a (na joke ooo) to kill me so that i will go to heaven. If true also, that means all the policemen that shoots armed robbers will go to hell while the robbers will go to heaven.

I have been thinking about this for sometime now.

NAIRALANDERS, PLEASE HOW TRUE IS THIS? I NEED MORE LIGHT ON THIS.