This was first pointed out on Freakonomics around 2005, then replicated multiple times including 2020. There are stories saying this was debunked but as a guy with just a masters they are garbage. Here is summary of point.

January 2000) Abortion is a divisive and emotional issue. Add racial overtones and the implication that public officials do not deserve all the credit for reductions in crime during the 1990s, and combustion is inevitable. Informed debate is not.

Stanford Law School professor John J. Donohue III and University of Chicago economist Steven D. Levitt ignited a debate last August when they released a study on the relationship between abortion and crime. Their findings suggest that legal abortions have prevented the births of many would-be criminals. The absence of these people, according to their research, is behind at least half of the dramatic drop in crime rates seen between 1991 and 1997.

Were the researchers just trying to stir up controversy with their results? Not at all, according to Donohue. “I was asked to write a paper on why crime was falling. In the course of looking at . . . various social programs and their impact on crime, I sort of stumbled across the data on abortion.”

The “sheer magnitude” of abortions prompted Donohue to dig deeper. When he and Levitt did, they found three factors especially compelling:

The timing. The abrupt drop in crime coincided with the coming of age (roughly 20 years later) of young people born after the 1973 Roe v. Wade Supreme Court decision legalizing abortion. Also, in states where abortion became legal before 1973, the drop in crime started sooner.

The magnitude. States with high abortion rates have experienced more dramatic declines — the authors estimate 15 percent higher declines — in crime.

The pervasiveness. The reduction in crime has occurred both in cities that have waged war on an acknowledged cause of violent crime, crack cocaine, and in cities relatively untouched by crack. Similarly, crime has fallen both in cities that have expanded their police forces and changed policing techniques and in cities that have not changed their policing techniques or expanded their police forces.

After the USSC overturns Roe vs Wade, get ready for the largest crime spike in US History to occur in Texas, Louisiana, Mississippi, Alabama, Florida, etc in about 12 to 16 years as the poors and criminals have millions of unwanted kids they can’t support who will become huge waves of criminals. I am guessing that huge gangs will reappear everywhere as well.

It will be the 70s all over if every gang member had a few AR-15s. Car jacking will be on every interstate, police will be outgunned and outmanned, they will likely have some type of control all major cities in the South.
It’s as foreseeable as death and taxes. Invest in private security companies etc in about 10 years and you can cash out, as you will need blackwater type guards to go shopping and bulletproof glass will be standard on nice cars etc.