. >> a man by the name of gregory allen, who the manitowoc city police department, as opposed to theriff's department, had under surveillance for a series of horrible crimes -- entries into homes, assaults of young women in the home late at night. >> reporter: a city detective told the sheriff's department they should look at allen, because he also fit the description penny provided. allen's photo was never shown to penny. >> he should have been, right off the bat, a suspect. and his picture should have been included in the original photo array. that's one of the things that bothers penny to this day. >> reporter: and in her interview with dateline back in 2005, penny herself revealed something startling -- penny told us she got a call from someone in the manitowoc city police department, not long after the sheriff's department had already put avery behind bars. >> he identified himself, and said, "we have another suspect in mind who is not steven avery, but who looks a great deal like steve. and we'd like to ask you some questions." >> reporter: penny says the manitowoc police detec