Student or Learner
"The police pronounced that the victim had been shot point-blank in the head."
Would it mean that someone pointed a gun at the victim's head so close that the forensic team detacted particles of gunpowder on victim's forehead?
'point blank' = from a range of 0.0 metres .[point]0[blank] - that is, strictly, with the weapon actually touching the target. But 'point blank' is often used to mean just 'from close range'.
Not that I know of. A common expression in crime dramas, though, is 'he was shot execution-style' - which comes close.