Good afternoon. It’s Monday, and Chicago is starting off another week with big questions about city violence. Here’s what you need to know today.

1. Lightfoot announces a 10 p.m. citywide curfew for minors after a teen was killed at Millennium Park

Mayor Lori Lightfoot today lowered the citywide weekend curfew to 10 p.m. from the current 11 p.m. in response to a deadly shooting on Saturday near The Bean in Millennium Park. Authorities have charged a 17-year-old boy in the shooting.

This earlier curfew comes after Lightfoot on Sunday said minors who are not accompanied by an adult would be banned from Millennium Park after 6 p.m., a move criticized by the ACLU of Illinois.

Pressed by reporters on how the city plans to enforce these new rules, Lightfoot said, “My interest is not in rounding up young people and throwing them in the back of a wagon. It’s in enforcing community norms.”

The mayor said she expects young people will follow the new rules when reminded of them. [Chicago Sun-Times]

So will the earlier citywide curfew work the way city officials envision?

“A voluminous body of research has cast strong doubts on the claims that juvenile curfew laws prevent victimization or reduce juvenile crime, but these findings have received scant attention from policymakers or police,” The Marshall Project reported in 2018. [Marshall Project]

2. Seandell Holliday, the 16-year-old boy fatally shot near The Bean, had a goal of living to 21

Seandell Holliday had 10 goals, one of which was living to 21, said the head of a youth mentoring class that Seandell attended.

“I asked him, ‘Why did you put that?’ ” said Vondale Singleton, the founder of the CHAMPS mentoring program. “He said because there are a lot of things that happen in Chicago, you see so many kids lose their lives at early ages … He couldn’t even make it to 17.”

Seandell, a freshman at Gary Comer College Prep on the South Side, was “a pretty quiet kid, really sharp, always witty… Deep dialogue. I knew he had a lot in him,” Singleton told the Chicago Sun-Times.

Singleton said he spoke with Seandell’s mother on Sunday. “She said, ‘The one time I let him out, he gets killed. He doesn’t go outside. He never goes outside. And the one time he goes outside, he gets killed.’ ” [Chicago Sun-Times]

3. There have been more than 200 mass shootings in the U.S. so far this year

A white, 18-year-old gunman allegedly carried out a racist attack at a supermarket in Buffalo, N.Y., on Saturday, killing 10 people in what was the deadliest mass shooting so far this year, reports NPR.

There have been 201 mass shootings in the U.S. this year, according to a tracker from the Gun Violence Archive. Last year, there were 693 such incidents.

The suspected gunman in Saturday’s deadly attack had planned to continue the rampage on a second target, said Buffalo Police Commissioner Joseph Gramaglia in an interview today with ABC News.

“We have uncovered information that if he escaped the [Tops] supermarket, he had plans to continue his attack,” Gramaglia said. “He had plans to continue driving down Jefferson Ave to shoot more black people … possibly go to another store [or] location.”

Meanwhile, Republican Rep. Liz Cheney accused her party’s leaders of enabling white nationalism, white supremacy and antisemitism. [NPR]

The racist “replacement theory” that was allegedly endorsed by the suspected gunman is a popular refrain among Tucker Carlson and Laura Ingraham of Fox News and conservative writer Ann Coulter. [Washington Post]

4. Where air pollution is the worst in Chicago

An analysis of readings from newly-installed air sensors across the city found portions of Little Village, Austin, Englewood, Auburn Gresham, Irving Park and Avondale have the highest levels of particulate matter pollution — a known cause of serious health problems.

Fine particulate matter is the single largest environmental contributor to death and is linked to a number of health problems, including heart and lung disease and asthma.

An estimated 5% of all premature deaths in Chicago can be attributed to particle pollution. Health experts compare the harm of breathing these particle pollutants to cigarette smoking.

Chicago officials say they want to increase the number of air monitors in the city as part of a wider environmental impact study. [WBEZ]

5. A potential breakthrough in treating Alzheimer’s disease

A team at Stanford University says it reversed memory loss in old mice by flooding their brains with spinal fluid taken from young mice, reports NPR.

The finding hints at “a whole new era” in the search for treatments for Alzheimer’s disease and other age-related conditions that affect a person’s memory and thinking, says Maria Lehtinen, a neuroscientist at Harvard Medical School, who wrote a commentary that accompanied the study.

Most efforts to treat Alzheimer’s have focused on eliminating the disease’s hallmarks: toxic plaques and tangles that build up in the brain. Those efforts have produced drugs that can reduce the plaques and tangles, but have yet to do much to preserve a person’s thinking and memory. [NPR]

Here’s what else is happening

• The Chicago City Council today approved new ward maps that create 14 majority-Latino wards and preserve 16 Black wards. [WBEZ]
• Will regulators be able to keep organized crime out of a Chicago casino? That’s a big question for the Illinois Gaming Board. [Chicago Tribune]
• A developer is seeking to demolish a 130-year-old church on Chicago’s North Side. [Block Club Chicago]
• Birdwatchers and fans are remembering Monty, the famous piping plover who nested in Chicago and helped take down an EDM festival. He died on Friday after being seen gasping for air. [Chicago Tribune]

Oh, and one more thing …

If you’re looking to beef up your storytelling skills and would like a chance to hear your voice on the radio, my friends over at WBEZ’s sister station, Vocalo, are holding free workshops for people between the ages of 18 and 35.

As part of this workshop, each participant will produce their own radio story, which may air on Vocalo and WBEZ. Applications are due May 25, and classes begin on June 4. [Vocalo]

Tell me something good …

This great weather has me itching to read outside. So, what’s a good book to read over the summer?

My all-time favorite “beach read” is Valley of the Dolls. I almost read the entire thing in one day while lounging in the sun at Kathy Osterman Beach.

I haven’t been back to that beach after the time I fell asleep and started hardcore snoring. I woke up and instantly realized what happened and fled.

What’s a good book to read this summer? Hit me up and your response might be shared in the newsletter this week.