Charles Manson follower Leslie Van Houten released from prison after 53 years

[Jarqui]

13. "It began an era of police violence against peaceful protesters"

Tate-LaBianca murders August 8–10, 1969

Before those murders:

1967 June 23. 1,300 police attack 10,000 peace marchers at The Century Plaza Hotel in Los Angeles
1967 October 18. "Dow Day", University of Wisconsin–Madison. This was the first university Vietnam War protest to turn violent. Thousands of students protested Dow Chemical (maker of napalm) recruiting on campus. Nineteen police officers and about 50 students were treated for injuries at hospitals
1967 December 4–8. Stop the Draft Week demonstrations in New York. 585 arrested, amongst them Benjamin Spock.

1968 May. Agricultural Building at Southern Illinois University (SIU) bombed.
1968 May 17. Philip Berrigan and his brother, Daniel, led seven others into a draft board office in Catonsville, Maryland, removed records, and set them afire with homemade napalm outside in front of reporters and onlookers
1968 August 28. Democratic National Convention in Chicago protests, "The whole world is watching". Police Violence.

1969 March 22. Nine protesters smashed glass, hurled files out a fourth floor window, and poured blood on files and furniture at the Dow Chemical offices in Washington, D.C.
1969 March 29. Conspiracy charges against eight suspected organizers of the Chicago Convention protests.
1969 June 8. The Old Main building at SIU burns to the ground. Units of firefighters from all over the area tried to salvage the building but could not put out the fire before everything was destroyed.

They were burning draft cards, etc throughout.
RFK & MLK were shot in '68

I don't think the Tate-LaBianca murders had that much to do with it.
Police violence against protestors started at least 2 years before.
The protest against Vietnam grew as more soldiers came home in body bags or badly wounded with escalation of the war and as the media turned on it.
I was in a few of those protests.