Card’s body was found in an area near a recycling center from which he had recently been fired, a law enforcement source told CNN. Earlier this week, authorities had found Card’s vehicle abandoned after the shooting near a boat launch in the Lisbon area.

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Authorities found a note from Card that indicated that he did not expect to be alive when the note was found, a law enforcement official told CNN.

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And while the motive for the massacre remained unannounced Friday evening, a key theory about why the bowling alley and the restaurant were targeted emerged during the investigation, law enforcement sources say.

Card recently broke up with a longtime girlfriend, and investigators are pursuing a theory that Card went to the bowling alley and the bar because they were places the couple used to frequent, law enforcement sources told CNN’s John Miller.