To parent's credit, the CDC did report a decline in life expectancy at birth from 2014 to 2017, but the decline was of of a couple decimal points total, which is well within standard error.
Claiming "trends are reversing" is, in fact, FUD.
Murders certainly increased markedly in major cities in 2020.
Regardless of the extent that the increase is due to statistical noise or socio-political factors: it is obviously incorrect to look at one deeply unusual year and proclaim the trend is “reversed.”