Housing Secretary Alphonso Jackson demanded that the Philadelphia Housing Authority transfer a $2 million public property to a developer at a substantial discount, then retaliated against the housing authority when it refused to do so, a recent court filing alleges.

The authority's director, Carl Greene, contends in a court affidavit that Jackson called Philadelphia's mayor in 2006 to demand the transfer to the developer, Kenny Gamble, a former soul-music songwriter who is a business friend of Jackson's. Jackson's aides followed up with "menacing" threats about the property and other housing programs in at least a dozen letters and phone calls over an 11-month period, Greene said in an interview.