Co-founder and CEO of Sandy Hook Promise Foundation Mark Barden wears a "Be Kind" necklace during an interview with The Associated Press, Monday, Dec. 5, 2022, in Newtown, Conn. Barden's son, Daniel, was among the 20 first graders and six educators killed at Sandy Hook Elementary School 10 years ago.

https://apnews.com/article/shootings-violence-school-connecticut-schools-6c172af05a6340942a0bc1f6ba767d64

Flowers rest on a welcome sign to the Sandy Hook Permanent Memorial, Monday, Dec. 12, 2022, in Newtown, Conn. The names of the 20 first graders and six educators killed a short distance away at Sandy Hook Elementary School 10 years ago are engraved in concrete around a memorial pool with a sycamore tree in the middle.

The Sandy Hook Permanent Memorial, Monday, Dec. 12, 2022, in Newtown, Conn. The names of the 20 first graders and six educators killed a short distance away at Sandy Hook Elementary School 10 years ago are engraved in concrete around a memorial pool with a sycamore tree in the middle.

Nicole Hockley, co-founder and CEO of Sandy Hook Promise Foundation, speaks during an interview with The Associated Press, Monday, Dec. 5, 2022, in Newtown, Conn. Hockley's son, Dylan, was among the 20 first graders and six educators killed at Sandy Hook Elementary School 10 years ago.

Co-founder and CEO of Sandy Hook Promise Foundation Nicole Hockley shows photographs of her son, Dylan, in her office, Monday, Dec. 5, 2022, in Newtown, Conn. Dylan was among the 20 first graders and six educators killed at Sandy Hook Elementary School 10 years ago.

Newtown, Conn. on Monday, Dec. 12, 2022.

Co-founder and CEO of Sandy Hook Promise Foundation Mark Barden reflects in a photograph of his son, Daniel, during an interview with The Associated Press, Monday, Dec. 5, 2022, in Newtown, Conn. Daniel was among the 20 first graders and six educators killed at Sandy Hook Elementary School 10 years ago.

The Sandy Hook Permanent Memorial, Monday, Dec. 12, 2022, in Newtown, Conn. The names of the 20 first graders and six educators killed a short distance away at Sandy Hook Elementary School 10 years ago are engraved in concrete around a memorial pool with a sycamore tree in the middle.

Cars drive through Sandy Hook, Conn. at dusk, Monday, Dec. 12, 2022.

A person bows their head at a memorial concert in honor of the 10th anniversary of the Sandy Hook Elementary School shooting, Monday, Dec. 12, 2022, in Newtown, Conn.