How do I make withness system for my field of view system

Help and Feedback Scripting Support
#1

Well I used this one Field of View script but I do not know how to fix it that it will check the character and also dead bodies like a withness system,this is the code:
local PlayerService = game:GetService(“Players”)
local NPC = script.Parent

local Range = 30 -- How far the NPC can see in studs.
local FOV = 70 -- The NPC's FOV in degrees.

local function GetCharacters()
	local Characters = {}
	
	for _, b in PlayerService:GetPlayers() do
		table.insert(Characters, b.Character)
	end
	return Characters
end

local function CheckLineOfSight(Start, End)
	local Params = RaycastParams.new()
	Params.FilterDescendantsInstances = {NPC, GetCharacters()}
	Params.FilterType = Enum.RaycastFilterType.Exclude
	
	local Raycast = game.Workspace:Raycast(Start, End - Start, Params)
	
	if Raycast then
		return false
	else
		return true
	end
end

local function FOVCast()
	for _, b in PlayerService:GetPlayers() do
		local Character = b.Character
		
		if Character then
			local NPCToCharacter = (Character.Head.Position - NPC.Head.Position).Unit
			local NPCLookVector = NPC.Head.CFrame.LookVector

			local DotProduct = NPCToCharacter:Dot(NPCLookVector)
			local Angle = math.deg(math.acos(DotProduct))
			
			local Distance = (NPC.HumanoidRootPart.Position - Character.HumanoidRootPart.Position).Magnitude

			if Angle <= FOV and Distance <= Range and CheckLineOfSight(NPC.Head.Position, Character.Head.Position) then
			else
			end
		end
	end
end

while task.wait(1) do
     FOVCast()
end

Can you guys fix it so it can like check other dummies in the field of view?

#2

Found this, hope it helps.