A fundraiser in honor of Sean Collier is back today through Sunday at Lyndell’s Bakery in Ball Square, Somerville.

Last year’s inaugural Sean Collier Memorial Weekend raised $6,200 for the Somerville Auxiliary Police Department Sean Collier Memorial Scholarship Fund, which helps high school seniors in Somerville achieve his unrealized dream: joining the Somerville Police.

The 127-year-old bakery plans a weekend sale in which sales of its half-moon cakes – dedicated to Collier and with his expected “310” badge number written on them in icing – go toward the fund. A dollar from every $2 half moon sold will be donated to the fund, said Dave Galatis, of the bakery’s founding family.

“Please come out and help us raise money and honor a local hero,” Galatis said on the bakery’s Facebook page. He appeared Oct. 9 on the community television program “Greater Somerville” with Chief Jerry Carvalho of the Somerville Auxiliary Police Department and host Joe Lynch to talk about the fundraiser:

In addition to the half-moon sales, there will be a weekend-long raffle including autographed sports memorabilia, gift baskets and gift cards from local businesses including Redbones, Highland Kitchen and Ball Square Wine & Liquors, and free coffee and breakfast will be served throughout, he said.

Collier, at the time a 26-year-old Somerville resident and police officer at the Massachusetts Institute of Technology, was killed April 18, 2013, in the aftermath of the Boston Marathon bombing – two months from a likely Somerville job offer after scoring high on the civil service exam.

The idea of the fundraiser began with a chance encounter with Collier’s brother, Rob, Galatis said.

“[We] had the chance to talk for a bit about Sean and his story. Knowing that Sean did so much for our community, I wanted to do something to honor and thank him. We came up the fundraiser idea and left the decision of where the money should go to Sean’s family,” he said.

Lyndell’s Bakery is at 720 Broadway, Ball Square, Somerville.