A federal jury has convicted the head of a Homewood telemarketing company of pocketing illegal kickbacks in exchange for referring patients to home health care agencies, according to a news release from the U.S. Attorney's office in Chicago.Sundae Williams, 47, of South Holland, owner of Serenity Marketing Inc., used unsolicited phone calls to recruit patients, including Medicare beneficiaries, for home health care services. Williams then referred those patients to several Chicago-area nursing agencies in exchange for payments on a per-patient basis.Serenity Marketing also does business as Serenity Living, 18216 Harwood Ave.After . . .