Why does my NPC not think I'm in it's sight even when I am?

So I need to program an NPC so that it'll detect the player if it spots suspicious activity. Here's the script I made:

local npc = script.Parent
local iconGui = script.Parent.Head.aiGui
local triggerPart = npc.DetectionPart.Handle
local itemsInSight = {}
local eis = false
local curChar = nil
local num = 0
local R = 0
local B = 200
local npcStatus = script.Parent["NPC Status"]
local detected = false

triggerPart.Touched:Connect(function(hit)
    print("New item-in-sight!")
    if game.Players:GetPlayerFromCharacter(hit.Parent) then
        if eis == false and detected == false then
            local plr = game.Players:GetPlayerFromCharacter(hit.Parent)
            local pGui = plr.PlayerGui
            local char = hit.Parent
            local detectGui = plr.PlayerGui.DetectGui
            curChar = char
            eis = true
            table.insert(itemsInSight, plr)
            script.Parent.Head.Eyes.Texture = game.ReplicatedStorage.Faces.SuspiciousEyes.Value
            local dFrame
            if script.DetectBar.Value == nil then
                local dFrame = plr.PlayerGui.DetectGui.Frame:Clone()
                script.DetectBar.Value = dFrame
                dFrame.Parent = plr.PlayerGui.DetectGui
                dFrame.Visible = true
                dFrame.Target.Value = script.Parent.HumanoidRootPart
            else
                dFrame = script.DetectBar.Value
            end

            --Scan for walls
            if table.getn(itemsInSight) >= 1 then
                repeat
                    local InFrontOfWall = false
                    local CheckNum = 0
                    repeat
                        CheckNum = CheckNum +1
                        if itemsInSight[CheckNum] ~= nil then
                            local Mag = itemsInSight[CheckNum]
                            if Mag.ClassName == "Part" or Mag.ClassName == "MeshPart" or Mag.ClassName == "UnionOperation" then
                                if (Mag.Position - script.Parent.Head.Position).Magnitude <= (hit.Position - script.Parent.Head.Position).Magnitude and hit.Name ~= "Handle" then
                                    InFrontOfWall = true
                                else
                                    InFrontOfWall = false
                                end
                            end
                        end
                        wait()
                        print("Check complete, CheckNum = "..CheckNum)
                    until CheckNum >= table.getn(itemsInSight) or InFrontOfWall == true
                    if CheckNum >= table.getn(itemsInSight) then
                        num = num +1
                        R = R +2
                        B = B -2
                        dFrame:WaitForChild("Bar1")["Bar"..num].Visible = true
                        dFrame.Bar2["Bar"..num].Visible = true
                        local bars = dFrame.Bar1:GetChildren()
                        for i = 1,#bars do
                            bars[i].BackgroundColor3 = Color3.fromRGB(R, 0, B)
                        end
                        local bars = dFrame.Bar2:GetChildren()
                        for i = 1,#bars do
                            bars[i].BackgroundColor3 = Color3.fromRGB(R, 0, B)
                        end
                    elseif InFrontOfWall == true then
                        eis = false
                    end
                    if eis == true then
                        if (script.Parent.Head.Orientation - script.Parent.HumanoidRootPart.Orientation).Magnitude <= 90 and (script.Parent.Head.Orientation - script.Parent.HumanoidRootPart.Orientation).Magnitude >= -90 then
                            script.Parent.Head.CFrame = CFrame.new(script.Parent.HeadCFramePart.Handle, hit.Parent.Head.Position)
                        end
                        if (hit.Position - script.Parent.Head.Position).Magnitude <= 50 and (hit.Position - script.Parent.Head.Position).Magnitude >= 40 then
                            if plr.PlayerGui.MainStats.Status.Text == "Disguised" then
                                wait(0.09)
                            elseif plr.PlayerGui.MainStats.Status.Text == "Armed" or plr.PlayerGui.MainStats.Text == "Frightening" then
                                wait(0.03)
                            end
                        elseif (hit.Position - script.Parent.Head.Position).Magnitude <= 40 and (hit.Position - script.Parent.Head.Position).Magnitude >= 30 then
                            if plr.PlayerGui.MainStats.Status.Text == "Disguised" then
                                wait(0.08)
                            elseif plr.PlayerGui.MainStats.Status.Text == "Armed" or plr.PlayerGui.MainStats.Text == "Frightening" then
                                wait(0.025)
                            end
                        elseif (hit.Position - script.Parent.Head.Position).Magnitude <= 30 and (hit.Position - script.Parent.Head.Position).Magnitude >= 20 then
                            if plr.PlayerGui.MainStats.Status.Text == "Disguised" then
                                wait(0.07)
                            elseif plr.PlayerGui.MainStats.Status.Text == "Armed" or plr.PlayerGui.MainStats.Text == "Frightening" then
                                wait(0.02)
                            end
                        elseif (hit.Position - script.Parent.Head.Position).Magnitude <= 20 and (hit.Position - script.Parent.Head.Position).Magnitude >= 10 then
                            if plr.PlayerGui.MainStats.Status.Text == "Disguised" then
                                wait(0.06)
                            elseif plr.PlayerGui.MainStats.Status.Text == "Armed" or plr.PlayerGui.MainStats.Text == "Frightening" then
                                wait(0.015)
                            end
                        elseif (hit.Position - script.Parent.Head.Position).Magnitude <= 10 and (hit.Position - script.Parent.Head.Position).Magnitude >= 0 then
                            if plr.PlayerGui.MainStats.Status.Text == "Disguised" then
                                wait(0.05)
                            elseif plr.PlayerGui.MainStats.Status.Text == "Armed" or plr.PlayerGui.MainStats.Text == "Frightening" then
                                wait(0.01)
                            end
                        end
                    end
                    wait()
                    print("Proccess Complete")
                until num >= 100 or eis == false
                if eis == false then
                    wait(3)
                    print("Detect System Restart")
                    repeat
                        num = num -1
                        wait(0.01)
                    until num <= 0 or eis == true
                    if num <= 0 then
                        script.Parent.DetectionManager.DetectBar.Value:Destroy()
                        script.Parent.Head.Eyes.Texture = game.ReplicatedStorage.Faces.OpenEyes.Value
                        script.Parent.Head.CFrame = CFrame.new(script.Parent.Head.Position, script.Parent.FaceFrontPart.Handle.Position)
                        print("Detect System Restart Successful")
                    end
                else
                    print("Detected")
                    script.Parent.HostageScript:Destroy()
                    --'Ahhh! A criminal!!'
                    local pGui = game.Players[hit.Parent.Name].PlayerGui
                    if pGui.MainStats.Status.Text == "Armed" or pGui.MainStats.Status.Text == "Frightening" then
                        workspace.Audio.NPCAlerted:Play()
                        detected = true
                        if pGui.MainStats.Status.Text == "Armed" then
                            script.Parent.Head.aiGui.Alerted.Visible = true
                            npcStatus.Value = "Alerted"
                            local num = 0
                            repeat
                                num = num +0.01
                                wait(0.01)
                            until num >= 1 or pGui.MainStats.Status.Text == "Frightening"
                            if num >= 1 then
                                local num = 1
                                local gui = pGui.ReloadingTutorial
                                gui.HintLabel.Text = "You took to long to frighten the civilian! Scope in before approaching her to make her surrender!"
                                repeat
                                    num = num -0.05
                                    gui.Image.ImageTransparency = num
                                    gui.HintLabel.TextTransparency = num
                                    gui.Label1.TextTransparency = num
                                    gui.Label2.TextTransparency = num
                                    wait(0.01)
                                until num >= 1
                                wait(1)
                                script.Parent.Head.aiGui.Alerted.Visible = false
                                npcStatus.Value = "Neutral"
                                hit.Parent.Parent.Head.CFrame = CFrame.new(game.Workspace.ResetTP2.Position)
                                wait(1)
                                repeat
                                    num = num +0.05
                                    gui.Image.ImageTransparency = num
                                    gui.HintLabel.TextTransparency = num
                                    gui.Label1.TextTransparency = num
                                    gui.Label2.TextTransparency = num
                                    wait(0.01)
                                until num <= 0
                            else
                                npcStatus.Value = "Hostage"
                                script.Parent.Humanoid:LoadAnimation(game.ReplicatedStorage.Animations["Hands Up"]):Play()
                                script.Parent.Head.aiGui.Alerted.Visible = false
                                wait(1)
                                script.Parent.Humanoid:LoadAnimation(game.ReplicatedStorage.Animations["Hands Up Idle"]):Play()
                                script.Parent.Head.Mouth.Texture = game.ReplicatedStorage.Faces.Frown.Value
                            end
                        elseif pGui.MainStats.Status.Text == "Frightening" then
                            npcStatus.Value = "Hostage"
                            script.Parent.Humanoid:LoadAnimation(game.ReplicatedStorage.Animations["Hands Up"]):Play()
                            script.Parent.Head.aiGui.Alerted.Visible = false
                            wait(1)
                            script.Parent.Humanoid:LoadAnimation(game.ReplicatedStorage.Animations["Hands Up Idle"]):Play()
                            npcStatus.Value = "Hostage"
                            script.Parent.Head.Mouth.Texture = game.ReplicatedStorage.Faces.Frown.Value
                        end
                        if script.Parent.DetectionManager.DetectBar.Value ~= nil then
                            script.Parent.DetectionManager.DetectBar.Value:Destroy()
                        end
                    end
                end
            end
        end
    else
        table.insert(itemsInSight, hit)
    end
end)

triggerPart.TouchEnded:Connect(function(hit)
    local plr = game.Players:GetPlayerFromCharacter(hit.Parent)
    if plr then 
        table.remove(itemsInSight, table.find(itemsInSight, plr))
        if eis == true then
            eis = false
        end
    else
        table.remove(itemsInSight, table.find(itemsInSight, hit))
    end
end)

I really have to solve this for the game (actively working on tutorial) and help would be appreciated. Thanks!

RAID (friends access): roblox.com/games/6034647915/RAID