respectfully snipped
Contrary to what we might think, rapists sometimes are impotent, or suffer some degree of sexual dysfunction. When that's true, the attack is often characterized by exggerated violence and "overkill". We've discussed piquerism in this thread, where stabbing substitutes for the physical act. In some cases foreign objects are used as a replacement for the phallus.
http://www.ncbi.nlm.nih.gov/pubmed/1795615
http://www.ncbi.nlm.nih.gov/pubmed/19232872
Regarding victims' clothing used in attacks, that is seen in many sexually driven murders. Sometimes it's incidental, in other cases it relates directly to the killer's motivation. I think that's true of
Michigan Co-Ed Murderer, John Norman Collins, where the use of his victims' clothing was a "signature". (BTW, Collins was arrested in July, 1969, so could not have been Kathy's killer.) Anyway, without going any further off track, I'll just say that I find using the coat lining to be unusual -- and coupled with the gloves in the throat, and the timeframe -- to be noteworthy, but not necessarily an indication of a common killer.
It's also important to note that in the years between 1966-1973, a rash of murders of young women took place in the Milwaukee area. CR was killed in Madison, and from 1976 through 1984, a number of other young women would be killed in Madison, WI (Capital City Murders). Personally, I think CR's murder is unrelated to the CCM, and should be included in the first group. At any rate, most victims of the unsolved murders from 1966-1973 were stabbed numerous times. CR is on the low end at 14 stab wounds, while Diane Olkwitz was stabbed over 100 times. As we know, multiple stab wounds was not a element of KJ's murder. (On the other hand, one commonality noted by detectives at the time was the proximity to railroad tracks in some of the murders.)
FWIW, I'm referring to these unsolved Wisconsin murders.:
Diane Olkwitz, 1966, Menomonee Falls, stabbed 106 times
Mary Ellen Kaldenberg, 1967, Kenosha, stabbed 12 times
Christine Rothschild, 1968, Madison, stabbed 14 times
Stephanie Casberg, 1969, Milwaukee, dismembered
Terri Erdmann 1971, Milwaukee, stabbed 50 times
Elizabeth Flannery, 1972, Portage, stabbed 30 times and survived
Cynthia Allen, 1972, Marinette, undetermined due to decomposition
Tina Davidson, 1973, Racine, stabbed 60 times
http://php.wisinfo.com/mktg/unsolved_apc/