As numerous male names had been found scrawled upon various stenographer's pads at Berdella's address, the detectives began attempting to trace each individual. One of these individuals traced, a young man named Freddie Kellogg, was able to state to detectives he and several other young men had intermittently lodged with Berdella since the early 1980s, and that Berdella had been in the habit of plying his lodgers with drugstypically intravenouslybefore engaging in sex with them regardless of whether they consented or not. Kellogg also stated Berdella had expressly stated that a condition of his lodging with him was for Kellogg to persuade young men whom Berdella found attractive to attend parties at Charlotte Street in order that Berdella could drug them. Should Berdella ever discover any of these individuals was a police informant, he would use this knowledge as a tool in which he could blackmail the individual to his own advantage. In spite of this condition of his living with Berdella, Kellogg further stated that numerous male prostitutes and addicts had been reluctant to engage in any form of contact with Berdella because of rumors regarding his links to the 1984 disappearance of Jerry Howell. In addition to these disclosures, Kellogg was able to name three of the individuals depicted in the Polaroids as being Todd Stoops, Robert Sheldon, and Larry Wayne Pearson. These investigators would shortly discover Berdella had paid a $30 fee to secure a bond for Pearson in June 1987 (), and that no further records existed to indicate Pearson was still alive. Nonetheless, investigators did discover that, in August 1987, Berdella had filed an assault report from a hospital room in which he alleged a man named "Larry Person" had deeply bitten his penis during oral sex, causing a serious laceration. An interview with Robert Sheldon's employers at a Kansas City manufacturing plant had confirmed the young man had been a reliable employee of theirs, but that he had suddenly ceased attending work in April 1985. Shortly after the search of 4315 Charlotte Street had concluded, Berdella was informed of the discoveries at his property. The same afternoon he was ordered to pose for the series of nude photographs for comparison with the Polaroid images he had taken, investigators attempted to conduct their first formal investigation with him, although Berdella simply invoked his right to silence in this setting. (Investigators later sought to obtain handwriting samples from Berdella in an effort to prove he had written the notes found within the various stenographer's pads discovered at his house; he refused to cooperate and was sentenced to six months in jail for contempt of court.)