Mexico City , Mexico ( CNN ) -- A medical examiner and three employees were suspended Monday pending the outcome of an inquiry into whether they meddled with the body of a slain Mexican drug kingpin , a state prosecutor 's office official told CNN . Arturo Beltran Leyva , a drug trafficker known as `` the boss of bosses , '' was killed on December 16 when Mexican navy commandos stormed a luxury condo in Cuernavaca , Mexico , where he was staying . Photos from the scene showed Beltran Leyva 's body splayed on the ground , with his pants pulled down past his knees and his T-shirt lifted up to his shoulders . The body was covered in blood-stained $ 100 bills and Mexican banknotes . The images created controversy in Mexico because it appeared that he intentionally had been placed in that position , in effect altering the scene . The official , who asked not to be named because he was not authorized to talk publicly about the case , said the four state employees will remain suspended until an investigation is complete . Two forensic photographers are also subjects in the inquiry but were not suspended , the source said . The end of Beltran Leyva 's reign over the cartel of the same name was hailed by Mexico and the United States as a major victory for Mexican President Felipe Calderon 's offensive against drug cartels . The offensive has claimed more than 7,600 lives this year , according to a tally by the El Universal newspaper . Six other cartel members and one naval petty officer also died in the raid that killed Beltran Leyva . Four members of the slain officer 's family were killed earlier this month , apparently in retaliation . The Beltran Leyva cartel is known for air transportation expertise . A U.S. Drug Enforcement Administration estimate from two years ago said the group smuggled 300 to 400 kilograms of cocaine monthly into the United States . The group is also known to smuggle black tar heroin .
Medical examiner , three employees suspended pending investigation . Mexican navy commandos killed drug lord this month . Arturo Beltran Leyva is a drug trafficker known as `` the boss of bosses '' Photos show body covered with money , with pants pulled down .