New Delhi, Aug. 29 -- 'Law enforcement were reportedly sifting through multiple journals and other evidence in search for a motive in the deadly Minneapolis church shooting, NBC news reported. Authorities say the shooter had a twisted desire for notoriety.

The shooter, identified as Robert Westman, killed two children and injured 18 worshippers attending Mass at a Minneapolis Catholic school. He was quiet and seemed to resent school as an eighth grader there seven years ago, a former classmate said.

Just hours before the massacre, Westman, 23, posted a series of twisted videos on YouTube, which included a manifesto, Minneapolis Police Chief Brian O'Hara confirmed at a press conference.

In one 20-minute video, Westman flips through the ...