Crime's been decreasing for years, and (from what I understand) this year is tracking to be one of the safest years on record?
Definitionally, there absolutely has to be a correlation (not causation) between those two factors you listed.
Most of the crime decrease from its peak happened before the year 2000.
That means back in the days of law enforcement needing to do low-tech wiretapping techniques, crime was still rapidly decreasing.
There’s just not even a correlation. And, as a reminder, correlation is not causation even if it was there.