LeaderStats? Recording Kills.

Okay so I'm trying to create a script that checks when a player has killed another player or Npc here's what i got.

if part then -- 'part' is the raycasting bullet
				local humanoid = part.Parent:FindFirstChild("Humanoid")
				local head = part
				if not head then
					
				end
				if head and head.Name == "Head" then
					local debounce = false
					head.Parent:FindFirstChild("Humanoid"):TakeDamage(25)
					if humanoid.Health == 0 and not debounce then
						debounce = true
						player.leaderstats.Kills.Value = player.leaderstats.Kills.Value + 1
						wait(3)
						debounce = false
					end
				end
				if not humanoid then
					humanoid = part.Parent.Parent:FindFirstChild("Humanoid")

				end
 
				if humanoid then
					humanoid:TakeDamage(6)

				end
				if humanoid.Health == 0 then  -- This is where i get all my errors from
					local playerw = game.Players:GetPlayerFromCharacter(part)
					playerw.leaderstats.Kills.Value = player.leaderstats.Kills.Value + 1
				end
			end