Not since the 60s. On paper its possible in theory during an era of low application numbers to become an officer in an obscure location with various waivers if you're lucky, but in practice the requirements to actually get hired as a P.O. are the same as military OCS.

You pretty much need a clean and successful record with a bachelors degree for both paths.

Degree inflation is a real thing, similar to how receptionists in 2020 need a degree in "something" whereas in the old days high school was enough. Boomer generation cops could get hired with a mere high school diploma but that was 50 years ago.