When people someone special talks they get special tag?

local chatFrame = script.Parent.Frame
plr = game.Players.LocalPlayer
-- Bind function to update from server
game.ReplicatedStorage.SendMessages.OnClientEvent:connect(function(messages)
	-- Clear all of the current messages
	chatFrame:ClearAllChildren()	
 
	-- Create TextLabel for every message
	for i, message in pairs(messages) do
		if plr.Name == "docrobloxman52" then
		local newLine = Instance.new("TextLabel", chatFrame)
		newLine.Text = "[DEV] "..message	
		newLine.TextColor = BrickColor.new(255,0,0)
		newLine.Size = UDim2.new(1,0,0,18)
		newLine.Position = UDim2.new(0,0,0,18*(i-1))
		newLine.TextXAlignment = Enum.TextXAlignment.Left
		newLine.TextYAlignment = Enum.TextYAlignment.Center
		newLine.BackgroundTransparency = 1
		newLine.BorderSizePixel = 0
		newLine.TextStrokeTransparency = 0.5
		newLine.FontSize = Enum.FontSize.Size18
		newLine.Font = Enum.Font.SourceSansBold
		elseif plr.Name ~= "docrobloxman52" then
		local newLine = Instance.new("TextLabel", chatFrame)
		newLine.Text = message	
		newLine.TextColor = BrickColor.new(255,255,255)
		newLine.Size = UDim2.new(1,0,0,18)
		newLine.Position = UDim2.new(0,0,0,18*(i-1))
		newLine.TextXAlignment = Enum.TextXAlignment.Left
		newLine.TextYAlignment = Enum.TextYAlignment.Center
		newLine.BackgroundTransparency = 1
		newLine.TextStrokeTransparency = 0.5
		newLine.BorderSizePixel = 0
		newLine.FontSize = Enum.FontSize.Size18
		newLine.Font = Enum.Font.SourceSansBold
		end
	end
end)

This is my script and when I tried it out, everyone that spoke had [DEV] next to their name. This is a problem. Can you help? Also it is in a local script