I visited my cousin in 1972 in Palo Alto.
He had a quart bottle of 100 proof Smirnoff. Into that bottle he put an eye dropper and dropped a drop onto 3 separate pieces of plain paper for myself and two friends.
He swore it was the concoction of a close associate of Owsley, AND that Owsley continued to make small batches in collaboration with “students” he was personally mentoring. It was known, and even acknowledged in government charging documents that the process he developed produced LSD-25 that was 99.99% pure.
He was out of prison and touring again with the Grateful Dead.
My cousin was in with these people for years before he moved north to be a dope grower in Sonoma county.
Needless to say it took nearly 20 hours to cross the San Mateo bridge and navigate the 100 miles home to Modesto. Downright adventurous.
I don’t believe Owsley ever got busted for acid. He got in trouble for amphetamine manufacturing, but as I mentioned he sued and got all his chemistry making materials stuff back.
It looks a lot like these guys were on the payroll, or at least the authorities looked the other way.