'Shocked, Shocked Is All I Can Say': Shooter's Family Reacts As New Details Into His Twisted Psyche Surface –– 4 Latest Developments In Oregon Shooting

Gunman's Parents React

Mercer's father Ian Mercer, based out of Tarzana, Calif., said that Thursday was a "devastating day," and that he had been working with authorities on the local and federal levels in the wake of the disaster. "Shocked, shocked is all I can say: Obviously it's been a devastating day, devastating for me and my family ... all I ask is please respect our privacy," he said. In Oregon, Harte added that she saw a woman she identified as his mother "crying her eyes out" in the wake of the murderous rampage. Mercer's step-sister Carmen Nesnick said she was stunned upon hearing what he had did, as she knew him as a selfless individual. "All he ever did was put everyone before himself -- he wanted everyone to be happy."

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Witnesses Recount Details

Hannah Miles, who was in a neighboring classroom, said that once shots were fired, students "began to run ... going every which way." Miles said that at one point, she "turned around, and I saw students pouring out of the building ... we started to run to center of campus." Sarah Cobb, who was in an adjacent room, said that she was "freaking out" when she heard shots fired. "I didn't know what to think, what to do."

More Details On Shooter

Authorities had descended upon the apartment complex Mercer lived at with neighbors shedding new light on the latest mass shooter. Mercer "seemed really unfriendly," his neighbor Bronte Harte told the AP, noting that the gunman had a habit of sitting "by himself in the dark in the balcony with this little light." Mercer's former neighbors said that he kept to himself consistently. Harper-Mercer praised Vester Flanagan in a blog two months ago, after the ex-news anchor killed two former co-workers in Virginia in a set of videos that stunned the nation. "Seems the more people you kill, the more you're in the limelight," he wrote. "A man who was known by no one, is now known by everyone -- his face splashed across every screen, his name across the lips of every person on the planet, all in the course of one day." He added, "Anyone who knew him could have seen this coming ... people like him have nothing left to live for, and the only thing left to do is lash out at a society that has abandoned them."