Alberto Piotti , security chief of Buenos Aires province , told local television that 3,600 dishonest officers had been purged from the force 's ranks in the past five years .
<response> <person>Alberto Piotti</person> , security chief of <location>Buenos Aires</location> province , told local television that 3,600 dishonest officers had been purged from the force 's ranks in the past five years . </response>