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Desperate Housewives - Season 8 - Who Killed Detective Chuck Vance? - Spoiler/Clue:

TV Guide:
“It seems very convenient that Carlos checked himself out of rehab the same night that Chuck became roadkill, don’t you think? But maybe too convenient. Instead, ask yourself who sent that ominous letter to Bree, and you might then realize who the vehicular manslaughterer is.”

So whoever sent Bree that infamous note back in episode 1 of season 8 could very well have been involved in the hit & run killing of Chuck Vance!?

Hmmmm …??? …. Speculate … Speculate … Speculate!!!?

Source: TV Guide