What kinds of changes? We already imprison so many people.
There are lots, but one of the changes was to make people go to prison less. Kinda?
The federal law in 1980 got all fucked up when it came to guns. Like, we put into place this three-strikes law called the Armed Career Criminal Act (ACCA). If you get caught with a gun and you're an ACCA, then it's 15-Life. Period. Nothing the Judge or lawyers can do.
Typical Congress unwittingly (?) made this law crazy overbroad. When you see "Career Criminal" you're thinking fucking El Chapo, right? Naw, it's some 18 year old kid who (in North Carolina) went
out on one single night when he was 15 and robbed three storage units.
See, the way the law is written, each individual storage unit counts as a separate offense. It's AMAZING how often this happens. Because, at the time, prosecutors in North Carolina were like, "defense attorney, I know your 14 year old client isn't a bad kid. I'll let him plea to the 3 Breaking or Enterings and we'll do a year of probation." EVERYONE was like, "yeah, that's totally reasonable."
But then like 30 years later, the 14 year old kid is 34 and joins a cub scout group for his kids. A disgruntled mom is like, "yo, I saw you plinking .22 shots with your kid at the cub scout range. I think you're a piece of shit and I'm reporting you." Bam. 15 years. Regardless if the guy cured cancer between 14 and 34.
The real perversion of this is that no one on the federal side knows it's going to be 15 years until after the guy has been charged thanks to the way congress wrote the law -- it's not an actual "crime;" it's a "sentencing enhancement." So the Court doesn't make the finding until right before sentencing.
Straight up, there are times when a less-than-seasoned attorney jumps in to federal court and gets a client who fails to disclose a juvenile record (or maybe wasn't even asked) and BAM, sentencing hits 15 years (instead of, like, 22 months). OUT OF NO WHERE. BAAAAAMMMMM GET FUCKED 20 year old kid with a shitty attorney.
GETTTTT FUUUUCCKKKKEEEDD
ETA --shit. Sorry. I hate that law so much I got caught up not answering your question. The reason that "burglaries" may have gone down in that timeframe is that state-level attorneys have started to get smart about the federal ACCA, so they plead their defendants away from "burglaries" and to stuff like larcenies and shit.