Neither Diane Russell or Arthur Fancy attends Danny Sorenson's funeral. Those two characters, as well as Martinez, would have definitely been there front and center with the other detectives from the 15th Squad. (Of course, their characters are no longer part of the series at this point, but it's an obvious story line error)
Andy says he already had a partner named John for six years, however during the first 6 months or so of his partnership with Bobby he regularly mentions that "the other guy" ( as he calls him) was his partner for eight years.