Autopsy

You touch a dead body, that has dead for less than a week. You feel the vibrations of the remaining lifeforce in the body and learn about the circumstances of its death.

You learn the cause of death. You either learn what item (Sword, poison, Claws etc.) or School of Magic was used to kill the creature. You only learn what killed them in the end. Previous attacks or attempts to kill will not be revealed.

After you learn this information, make an Ability Check using your Spellcasting Modifier to try and learn more precise information about the cause of death:
The DC is equal to 10 + 2x the Rarity of the Item, or 10 + the Lvl of the Spell used.
On a success, the caster learns the specific Item or Spell that was used. On a fail, the caster learns no new information.

If you cast this spell at a higher Level, the Duration of death extends. At 3rd Lvl the body must be dead less than a month. At 5th Lvl no longer than a year. At 7th Lvl not longer than a Century. And at 9th Lvl there is no limit to how long the creature is dead.