conviction_status birth_place image_size conviction_penalty charge name image_caption birth_date article_title birth_name
imprisoned at saskatchewan federal penitentiary edmonton , alberta , canada 220px 25 years to life imprisonment first degree murder mark twitchell arrest -lrb- october 31 , 2008 -rrb- photograph of mark twitchell taken by edmonton police 4 july 1979 mark twitchell
 mark andrew twitchell
mark twitchell

mark andrew twitchell -lrb- born july 4 , 1979 -rrb- is a canadian convicted of first degree murder in 2011 for killing john brian `` johnny '' altinger .
his trial attracted substantial media attention because he was inspired by the dexter morgan character , featured in jeff lindsay novels and the `` dexter '' television series , a serial killer who works as a forensic bloodstain pattern analyst for the fictional miami metro police department .
born in edmonton , alberta , twitchell was an aspiring filmmaker who dreamed of making blockbuster movies .
in september 2008 , he shot a short horror film at a garage he rented in the south end of edmonton .
