I did see a posting for a helo spot on the east coast last year that was direct entry. With that said, those are few and far between. Best chances are joining a PD, working the road for a bit and then moving into a spot.

I know LAPD required(my info may be dated) 5 years of patrol then you can apply to aero bureau. A pilot I spoke to over there said he got his Comm Multi in a fixed wing on his own and then they trained him on the Aerostar. He loved his gig.