Court of Appeals for the Seventh Circuit April 26, 1991, 89-3237, 89-3482 (United States v. Scott Allen and Maurice Allen)

KANNE, Circuit Judge.

Linda Bivens, an undercover agent with the Illinois State Police, accompanied a confidential informant to an apartment in Springfield, Illinois, to purchase cocaine. The informant knocked on the door at the top of the entrance stairs and stated her name. An intercom telephone sitting on the steps rang. The informant answered and stated her name again.