[2] Murderer specifically tries to pin the murder on someone else. Someone else being prosecuted is a good way to live free after, gifts his laptop and a ruler to the suspect or leaves them somewhere where they are discovered and taken.

Is that unlikely? Is it more unlikely than a murderer keeping the laptop and ruler from a victim, tying him to the murder?

For me this alone would be absolutely insufficient evidence, to sentence someone to death. The ease with which some here would do this shocks me.