I seriously doubt homicide detectives would spend hours showing Wint's attorney around the crime scene if there is proof the shoe print matches Wint. Instead, I think it likely they were examining the evidence of co-conspirators to motivate Mr. Wint to engage in a plea deal in exchange for information.
Three weeks since the bodies were found, Assistant U.S. Attorney Emily Miller, the prosecutor in the case, was back at the house looking for evidence Thursday. Members of the Public Defender service, who represent Wint, were also at the scene with their own team of crime scene investigators. They spent about two-and-a-half hours in and around the house taking pictures. They were escorted around by homicide detectives.
http://www.nbcwashington.com/news/l...Search-Personal-Assistants-Car-306224331.html
Each side is able to visit the crime scene and do their own research/take photos/take notes/come up with ideas and questions.
The homicide detectives would be present to act more as 'minders', and perhaps to answer questions. But not to act as 'tour guides' or to direct their visit.