By March 21, 1967, his release day, he had spent more than half of his 32 years in prisons and other institutions.
Now, living mostly by panhandling, he soon got to know Mary Brunner, a 23-year-old graduate of the University of Wisconsin–Madison. Brunner was working as a library assistant at University of California, Berkeley, and Manson moved in with her. According to a secondhand account, he overcame her resistance to his bringing other women in to live with them. Before long, they were sharing Brunner's residence with 18 other women.
Manson established himself as a guru in San Francisco's Haight-Ashbury, which, during 1967's "Summer of Love", was emerging as the signature hippie locale.
Expounding a philosophy that included some of the Scientology he had studied in prison, he soon had his first group of followers, most of them female.
Before the summer ended, Manson and eight or nine of his enthusiasts piled into an old school bus they had re-wrought in hippie style, with colored rugs and pillows in place of the many seats they had removed. They roamed as far north as Washington state, then southward through Los Angeles, Mexico, and the southwest. Returning to the Los Angeles area, they lived in Topanga Canyon, Malibu, and Venice—western parts of the city and county.
In 1967, Brunner became pregnant by Manson and on April 15, 1968 gave birth to a son she named Valentine Michael (nicknamed "Pooh Bear") in a condemned house in Topanga Canyon and was assisted during the birth by several of the young women from the Family. Brunner (like most members of the group) acquired a number of aliases and nicknames, including: "Marioche", "Och", "Mother Mary", "Mary Manson", "Linda Dee Manson" and "Christine Marie Euchts".
In an alternative account, Manson acquired Family members during some months of travels that were undertaken, in part, in a Volkswagen van. He was apparently accompanied by Brunner. It was November when the school bus set out from San Francisco with the enlarged group.
On July 25, 1969, Manson sent sometime Family member Bobby Beausoleil along with Mary Brunner and Susan Atkins to the house of acquaintance Gary Hinman, to persuade him to turn over money Manson thought Hinman had inherited. The three held the uncooperative Hinman hostage for two days, during which Manson showed up with a sword to slash his ear. After that, Beausoleil stabbed Hinman to death, ostensibly on Manson's instruction. In magazine interviews of 1981 and 1998–99, Beausoleil would say he went to Hinman's to recover money paid to Hinman for drugs that had supposedly been bad; he added that Brunner and Atkins, unaware of his intent, went along idly, merely to visit Hinman. On the other hand, Atkins, in her 1977 autobiography, wrote that Manson directly told Beausoleil, Brunner, and her to go to Hinman's and get the supposed inheritance—$21,000. She said Manson had told her privately, two days earlier, that, if she wanted to "do something important", she could kill Hinman and get his money.