Heartbeat - play a sound to players who are close to another player? - 'murderer'

--LocalScript in ReplicatedFirst

local Players=game:GetService"Players"
local Player=Players.LocalPlayer
local function onCharacterAdded(char)
    local player=Players:GetPlayerFromCharacter(char)
    if player==Player then return end
    local sound=Instance.new("Sound",wait()and char.PrimaryPart)
    sound.SoundId="rbxassetid://1839943553"
    sound.Looped=true
    local backpack=player.Backpack
    --local knife=not player.Innocent.Value
    local knife;
    backpack.ChildAdded:Connect(function(v)
        --if v.Name=="Knife"then knife=v end
        knife=v
    end)
    --knife=backpack:FindFirstChild"Knife"
    knife=backpack:FindFirstChildOfClass"Tool"

    local hrp,hrp2=char.PrimaryPart,(Player.Character 
        or Player.CharacterAdded:Wait()):WaitForChild("HumanoidRootPart",Players.RespawnTime+1)
    coroutine.wrap(function()
        while(char.Parent and wait(2))do
            sound.Playing=knife and (hrp.Position-hrp2.Position).magnitude<40 or false
        end
    end)()

end
local function onPlayerAdded(player)
    player.CharacterAdded:Connect(onCharacterAdded)
    local char=player.Character
    if char then
        onCharacterAdded(char)
    end
end
Players.PlayerAdded:Connect(onPlayerAdded)
for _,v in ipairs(Players:GetPlayers())do
    onPlayerAdded(v)
end

I think it is possible to add a part inside the murderer that plays a heartbeat sound constantly nearby. First, you have to get the character of the murderer, and put it inside a variable. I'm going to name this variable murderer, but it has not been actually defined in the code block I am going to be writing in. Also, make sure to replace "rbxassetid://176554627" with your asset id inside quotes. If you want to, you can change the maximum distance (in studs) you can hear the heartbeat inside line 12. Here is the script:

local part = Instance.new("Part")
part.Name = "Heartbeat Storer"
part.Anchored = false
part.CFrame = murderer:WaitForChild("HumanoidRootPart").CFrame
part.Parent = murderer
part.Transparency = 1

local sound = Instance.new("Sound")
sound.Name = "Heartbeat Sound"
sound.Parent = part
sound.RollOffMode = Enum.RollOffMode.Linear
sound.RollOffMaxDistance = 100
sound.SoundId = "rbxassetid://176554627"
sound.Looped = true
sound:Play()

local weld = Instance.new("WeldConstraint")
weld.Name = "HeartbeatWeld"
weld.Part0 = part
weld.Part1 = murderer:WaitForChild("Torso") or murderer:WaitForChild("UpperTorso")
weld.Parent = murderer