( CNN ) -- The daughter of Peter Kalikow , the former owner of the New York Post , has been arrested after allegedly trying to sell 30 bags of heroin , court documents show . Kathryn Kalikow , 27 , and Brian Whelan , 28 , were charged Monday with possession of drugs with intent to sell after allegedly advertising the drugs on Craigslist as `` high quality diesel pain relief . '' On Sunday , undercover police detectives in the Bronx , New York , responded to the Craigslist post , which referred to the heroin as `` stamps , diesel , H train , dope , bundles , tickets , dog food . '' They set up a meeting through text messages , one of which said , `` It 'll be $ 400 and an extra $ 40 to deliver it . '' Kalikow and Whelan agreed on an address , arrived in a blue Volkswagen and texted an undercover detective , who went to the vehicle and questioned the couple , the documents say . Kalikow said , `` Yes I have drugs . He 's my boyfriend , I was holding on to it for him , '' the records show , and she gave the detective three plastic bags , each containing 10 small bags of a tan , powdery substance . The court documents say Whelan told officers that it was his idea to post the ad on Craigslist because he needs treatment . `` I am a heroin addict , '' he said , `` and to afford the drug , I agreed to sell some of the drug on consignment for the person I buy from . '' Whelan and Kalikow pleaded not guilty at their arraignments Monday and were released on their own recognizance . They are expected to return to court on May 14 , said Melvin Hernandez , a spokesman for the Bronx district attorney . On Monday evening , just after the arraignment , Whelan 's family admitted him voluntarily to a drug rehabilitation facility , Whelan 's attorney , Marvin Ray Raskin , said Tuesday . Kalikow 's attorney did not immediately return calls to CNN . Her father purchased the New York Post in 1988 and sold it in 1993 , and was the chairman of New York 's Metropolitan Transportation Authority from 2001 to 2007 . He now operates a real estate business based in his 49-floor skyscraper , 101 Park Avenue . He said in a statement that he and his wife `` are very concerned , and all we are concentrating on now is helping our daughter . ''
They say they responded to a Craigslist ad , received money from a couple . Kathryn Kalikow , 27 , and Brian Whelan , 26 , pleaded not guilty at their arraignments . They 're charged with possession of cocaine with intent to distribute .