On a different tangent:
On the subject of life imitates "art", I find the parallels in some of the details about DM and his favourite television show interesting.
I'm thinking his favourite character wasn't Dexter, but Jordan Chase, a fifth season antagonist whose back story is that he grew from being an odd "fat kid" to a "very ambitious man", a philosophical, charismatic leader of a foundation, a front for a death cult that disposes of victims in barrels. Chase, also a photographer, records the crimes.
http://dexter.wikia.com/wiki/Jordan_Chase
DM would have learned from watching Dexter that barrels can be discovered, which leads me to think that one of his favourite movies may be Monsieur Verdoux, a Charlie Chaplin black comedy based on the real French mass murderer Henri Landru.
[ame="http://en.wikipedia.org/wiki/Monsieur_Verdoux"]Monsieur Verdoux - Wikipedia, the free encyclopedia[/ame]
Verdoux/Landru used incinerators because he believed that evidence would be sufficiently destroyed that he would avoid conviction even if implicated in the disappearances. The bodies were all sufficiently destroyed for the forensics of the time. What V/L did not realize is that French law allows circumstantial evidence to be used to convict, moreso than here.
The movie starts with neighbours complaining about the smell and soot emanating from the incinerator and Verdoux aghast that he almost stepped on a caterpillar (not an ant) after stuffing the incinerator. The movie makes several points about V/L's love of animals and his philosophical justification for murdering humans.
Not in the movie but in real life, Landru's father committed suicide when he learned what his son was up to.