This has been posted several times before:
One source:
http://www.cnn.com/2014/05/26/justice/california-elliot-rodger-timeline/
December 2012: Rodger bought his first hand gun, a Glock 34 semiautomatic pistol. He wrote that it was his "first act of preparation" for his planned attacks. "I did this quickly and hastily, at a local gun shop ... " he wrote.
Spring 2013: "During this Spring of 2013, I began to seriously think about planning the Day of Retribution," Rodger wrote. He purchased a second hand gun, which he said was "of a much higher quality than the Glock" he bought in December. The Sig Sauer P226 was "a lot more efficient."
He had $5,000 saved to "buy all of the supplies and equipment I would need," he wrote.
"The Spring of 2013 was also the time when I came across the website PUAHate.com," he wrote.
July 2013: Rodger wrote that he attempted a "last ditch effort of desperation" just days before his 22nd birthday "to live an enjoyable college life" in Isla Vista.
Rodger, intoxicated from shots of vodka, tried to push girls off a 10-foot ledge after a "dark, hate-fueled rage overcame my entire being," he wrote. Instead, he fell off the ledge and hurt his leg.
Also that month, Rodger filed a complaint against a roommate who he accused of stealing $20 worth of candles from him, according to the Santa Barbara County Sheriff.
August 2013: Rodger's broken leg meant a delay.
His mother gave him "a better car" in August, he wrote. The BMW 3-series coupe "gave me one last twinge of hope as the remaining months of 2013 passed."
September 2013: Two new roommates moved into the Isla Vista apartment with Rodger. He quickly added them to the list of people he planned to kill. "I knew that when the Day of Retribution came, I would have to kill my housemates to get them out of the way. "
January 2014: Rodger picked a date for his attacks: April 26, 2014. He ruled out Valentine's Day because he needed more time to prepare, although he wrote that the date "would have been very fitting, since it was the holiday that made me feel the most miserable and insulted."
April 2014: The only preparations remaining as Rodger's chosen date approach was the completion of his "My Twisted World" manifesto and recording his last video, he wrote.
He uploaded several videos to YouTube "in order to express my views and feelings to the world" in the week leading up to April 26, he said. One was titled "Why do girls hate me so much?"
Rodger's mother saw his new videos online in late April and called police to ask that they check on her son. Seven officers knocked on his apartment door on April 30, he wrote. (NOTE*several articles say she called a health facility* added by me )
He took down the videos from YouTube that disturbed his mother.
May 2014: "During the last few weeks of my life, I continued my daily adventures around town, trying to experience as much of the world as I could before I die," Rodger wrote.
He uploaded the "Why do girls hate me so much?" video again to YouTube on May 22.
Rodger uploaded his final video, in which he described his motives, just before leaving his apartment for his shooting spree.
At 9:17 p.m., he e-mailed his 107,000 word story -- titled "My Twisted World" -- to about a dozen people, including his parents and a therapists. His mother watched his final video online, called her ex-husband and then police.