Bolivia’s former top policeman who had previously been in charge of its counter-narcotics force is being held on suspicion of illicit enrichment and links to the drugs trade.Gen Oscar Nina led Bolivia’s national police force from 2010 until 2011.
His wife, daughter and son were also arrested and have been charged with illicit enrichment.
Bolivia is the world’s third largest producer of cocaine after Peru and Colombia.
His arrest comes less than four years after a US court sentenced another former Bolivian drug czar, Rene Sanabria, to 15 years in jail for drug trafficking.
Gen Nina was sacked as police chief just over two weeks after Sanabria was arrested, although it is not clear whether the two events were linked.
President Evo Morales said at the time that Bolivia had to eradicate the “cancer of corruption” from the police force.