Uncle Scotty's latest podcast has retired Detective John Helms as a guest. They talk about the early days of LAPD SWAT, SIS, the transition to 1911's ("grab a couple pistols out of a box of mismatched, seized guns"), the introduction of the Modern Technique into the department, and lots of other stuff. Well worth a listen.
ITTS Podcast: With Deadly Force (internationaltactical.com)