Judging by the Hans Reiser case "no body, no crime" doesn't work at all.
there's something to be said about people instinctively distrusting the socially inept: just look at all these modern "catch a pedophile" outfits, where losers are baited by impossible situations into ruining their life.
...several days after the killing (per the testimony of an officer)[0]. reading books about homicide investigation is not illegal, and certainly not suspicious enough to convict beyond a reasonable doubt.
I believe a more charismatic person could have talked his way out of it. At the very least the first impression wouldn't have been "eccentric unsympathetic computer guy, russian mail-order bride, he probably did it".