▁Ins pect or ▁ ▁Chief ▁Ins pect or ▁ ▁Super int endent ▁ ▁Chief ▁Super int endent ▁ ▁The ▁standard ▁Chief ▁Officer ▁ranks ▁outside ▁London ▁are : ▁▁ ▁Ass istant ▁Chief ▁Const able ▁ ▁Deput y ▁Chief ▁Const able ▁ ▁Chief ▁Const able ▁ ▁Within ▁London ' s ▁Metropolitan ▁Police ▁Service ▁the ▁Chief ▁Officer ▁ranks ▁are : ▁▁ ▁Commander ▁ ▁Deput y ▁Ass istant ▁Commission er ▁ ▁Ass istant ▁Commission er ▁of ▁Police ▁of ▁the ▁Metropol is ▁ ▁Deput y ▁Commission er ▁of ▁Police ▁of ▁the ▁Metropol is ▁ ▁Commission er ▁of ▁Police ▁of ▁the ▁Metropol is ▁ ▁The ▁City ▁of ▁London ▁Police ▁use ▁similar ▁Chief ▁Officer ▁ranks ▁to ▁the ▁Metropolitan ▁Police ▁Service ▁but ▁with ▁fewer ▁ranks : ▁▁ ▁Commander ▁ ▁Ass istant ▁Commission er ▁ ▁Commission er ▁of ▁the ▁City ▁of ▁London ▁Police ▁ ▁A ▁police ▁officer ▁with ▁investig ative ▁duties , ▁up ▁to ▁and ▁including ▁the ▁rank ▁of ▁Chief ▁Super int endent , ▁is ▁a ▁detect ive ▁and ▁the ▁word ▁Det ect ive ▁is ▁prefix ed ▁to ▁their ▁rank ▁( e . g . ▁Det ect ive ▁Chief ▁Ins pect or ), ▁except ▁for ▁the ▁rank ▁of ▁Police ▁Const able ▁where ▁the ▁word ▁Police ▁is ▁omitted , ▁making ▁them ▁a ▁Det ect ive ▁Const able . ▁ ▁United ▁States ▁ ▁The ▁United ▁States ▁law ▁enfor cement ▁ranking ▁model ▁is ▁generally ▁quasi - mil it ary ▁in ▁structure . ▁Each ▁level ▁of ▁law ▁enfor cement ▁( f eder al , ▁state , ▁and ▁local ) ▁has ▁different ▁ranks ▁and ▁vary ▁consider ably