Payday 2 full release LUA hack.

function FollowUnit()

local new_objective

local valid_criminals = {}
for pl_key, pl_record in pairs( managers.groupai:state():all_player_criminals() ) do
if pl_record.status ~= "dead" then
table.insert( valid_criminals, pl_key )
end
end

if #valid_criminals > 0 then
local follow_unit = managers.groupai:state():all_player_criminals()[ valid_criminals[ math.random( #valid_criminals ) ] ].unit -- pick a random player
new_objective = { 
type = "follow",
follow_unit = follow_unit,
scan = true,
is_default = true
}
end
return new_objective
end


function SpawnMob()

local spawn_point = managers.network:game():get_next_spawn_point()

local spawn_pos = spawn_point.pos_rot[1]
local spawn_rot = spawn_point.pos_rot[2]

local unit_name = Idstring( "units/payday2/characters/npc_criminals_suit_1/dallas/npc_criminal_suit_dallas" )
local myobjective = FollowUnit()

local spawn_ai = { 
init_state = "idle",
objective = myobjective
}

local unit = World:spawn_unit( unit_name, spawn_pos, spawn_rot )

unit:movement():set_character_anim_variables()

unit:brain():set_spawn_ai( spawn_ai )
unit:brain():set_active( true )
managers.network:session():send_to_peers_synched( "set_unit", unit, "random", "", 0 )

end


if Network:is_server() then
SpawnMob()
managers.hud:show_hint( { text = "AI Spawned" } )
end

 BaseInteractionExt._get_timer = function(self) return 0 end