BRIDGEPORT, Conn. (CBSNewYork/AP) — The families of more than a dozen victims of the 2012 Newtown school shooting will split $1.5 million under settlements of lawsuits filed against the estate of the gunman’s mother.

Joshua Koskoff, a lawyer for several victims’ families, said the settlements were finalized last Thursday in documents filed in Bridgeport Superior Court.

The lawsuits said Nancy Lanza failed to properly secure her legally owned Bushmaster AR-15 rifle. Her son, 20-year-old Adam Lanza, used the rifle to kill 20 first-graders and six educators at Sandy Hook Elementary School on Dec. 14, 2012.

Lanza killed his mother before the school shooting and killed himself afterward.

The families of 16 people who were killed in the massacre will split $1.5 million from Nancy Lanza’s homeowner’s insurance.

The families also are suing the maker of the Bushmaster rifle.

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