Head of CANTV President
Carlos Andres Pérez was elected in 1974 and in 1977 appointed Halvorssen, then 34, president of the Venezuelan state-owned telephone company
CANTV; Halvorssen was president and CEO of CANTV from 1978 until Pérez completed his term. While the head of CANTV, Halvorssen became more involved with the
National Directorate of Intelligence and Prevention Services (DISIP).
Special commissioner on anti-narcotic affairs When President Pérez was elected President again in 1989, he named Halvorssen Venezuela's "special commissioner for international narcotic affairs" with the rank of ambassador. As chief of anti-narcotics, Halvorssen was behind the extradition to Italy of the
Cuntrera-Caruana Mafia clan members Pasquale, Paolo and Gaspare Cuntrera. Gaeton Fonzi, former U.S. Senate investigator, wrote that "the remaining Mafia in Venezuela do not remember Halvorssen fondly for that". Halvorssen worked closely with
Manhattan District Attorney Robert M. Morgenthau investigating the financial affairs of Venezuelan government officials. Halvorssen discovered the secret bank accounts of Venezuelan president
Carlos Andrés Pérez, the man who had appointed Halvorssen. The evidence revealed $19 million that Perez and his mistress, Cecilia Matos, had deposited into numbered accounts. This discovery and the airing of the evidence in Venezuela led to the impeachment of President Perez in May 1993. When Pérez offered him the position of "drug czar", Halvorssen says he accepted because, "I went to a detoxification clinic in the US and I was so appalled by what I saw there that I resolved that I would do anything I could to fight drug trafficking." According to
Isabel Hilton, writing in the British edition of ''
Gentleman's Quarterly (GQ)'', observers say that Pérez may even have offered Halvorssen the job as a necessary matching gesture when US president
George H. W. Bush appointed
William Bennett as his Director of National Drug Control Policy, thinking that Halvorssen was still drinking and would not raise issues. Halvorssen performed his duties well, deciding to use his worldwide contacts and intelligence connections to detail the extent of Venezuela's role in the drug world. Halvorssen believed that Pérez was not responding to his reports on drug trafficking and money laundering, so Halvorssen approached his ally, Venezuelan Senator Cristobal Fernandez Daló. In 1992, he was appointed special overseas investigator of an Anti-Money-Laundering Commission by the Venezuelan Senate. He was a liaison between law enforcement agencies around the world, working on drug and money-laundering cases.
Notable investigations During his time as commissioner, Halvorssen began an investigation with the assistance of
New York District Attorney Robert Morgenthau, uncovering that President Pérez had a secret $19 million account with his mistress Cecilia Matos. After Cuban-Venezuelan
Orlando Castro Llanes–one of Venezuela's wealthiest individuals–attempted a
takeover of the Venezuelan elite's
Banco de Venezuela in 1990, the bank paid Halvorssen $1.7 million to investigate Castro. The investigations by Halvorssen revealed that Castro was a business associate of Pablo Escobar, head of the Medellin drug cartel. Evidence included business letters between Escobar and his lawyer making reference to Castro's banking and insurance companies. ==Arrest and imprisonment==