◆ SpookStack

Nos. 77-1698, 77-1210 & 77-1370 15 informed Jalovec that Hampton and Johnson were living at the apartment, that other members of the BPP frequented the apartment, and that a variety of weapons, illegally purchased, was kept there. About the first of December Mitchell told Jalovec that a sawed-off shotgun and a stolen police gun were in the apartment. Shortly thereafter, according to plaintiffs’ evidence, Mitchell met with Jalovec and Groth and, with Piper’s prior approval, showed them the floorplan of the West Monroe Street apartment. Mitchell also told them that a BPP political education meeting was scheduled for the evening of December 3 and that the occupants of the apartment likely would be absent then. At trial, Groth did not recall attending the meeting with Mitchell. Groth did claim, however, to have received a phone call sometime during the late afternoon | or evening of December 2 from an unidentified inform- ant who provided information paralleling -the infor- mation transmitted by Mitchell. Groth stated that this unidentified informant—who was unpaid—was a mem- ber of the BPP.*8 Groth met with Jalovee on December 3 and had a discussion with- him about the information Groth. received from his informant. Jalovec said that he had received essentially the same information from Mitchell. Groth also told Jalovec that he had surveyed the premises at 2387 West Monroe Street on his way to work that morning. Later that day Groth instructed Davis and Kelly to survey the premises, and they returned with a street diagram of the surrounding area. Groth told Davis, Kelly, and a few other officers assigned to the SPU that they would be going to the apartment at 8:00 p.m. that night to search the premises for illegal weapons. At midday on December 3 Jalovec and Groth met with Hanrahan and recounted the information they had received from their sources. At this meeting Jalovec told 3 The plaintiffs question whether Groth’s informant in fact ever existed. The trial court did not require Groth to disclose the identity of his informant. See injra, pp. 61-67.