The crime rate has not set new records. The murder rate has trended down from the horribly high numbers of the past couple of decades down to the levels of the 1970s. Rates for rape, assault, and robbery have also trended down somewhat in recent years. The problem is that the "new normal low rate" is still way higher than the much lower rate of the 1950s and early 1960s. Property crime is down in the past 10 years but it is much higher than rates from 50 years ago.
Aging baby boomers are not as spry as they used to be and can't seem to commit as many violent crimes as they once were able to commit. This is one of the positive results of the aging of the boomer generation population bump.