How can I make this script only choose 1 person?

I need help how can I make this script only choose one person and not like 3 or 4 . Code:

function selectCharacter(person)        --XD this got a wee-bit confusing!  
local chosen = person[math.random(1,#person)]   
if string.find(tagger.Value,chosen.Name) == nil then        
if chosen:findFirstChild("ItStatus") ~= nil then            
chosen:findFirstChild("ItStatus").Value = true      
end         
if chosen:findFirstChild("leaderstats") ~= nil then             chosen:findFirstChild("leaderstats").Value = 0      
end         
local hum = chosen.Character:findFirstChild("Humanoid")         
if hum ~= nil then          
hum.WalkSpeed = 20      
end         
local parts = chosen.Character:GetChildren()        
for i = 1,#parts do             
if parts[i].className == "Part" then                
parts[i].Anchored = false           
end     end         
wait()      
local tagscript = chosen.Character:findFirstChild("Torso"):findFirstChild("TagFlee")        
if tagscript ~= nil then            
tagscript.Name = "Murderer"         
end         
local tagblock = chosen.Character:findFirstChild("TagBlock")        
if tagblock ~= nil then             
tagblock.Parent = nil       
end         
dubHat(chosen)      
tagger.Value = tagger.Value..", "..chosen.Name 
else        selectCharacter(person)     end end