Jefferson Parish District Attorney Paul D. Connick Jr. announced today that a grand jury has returned an indictment against Terrance L. Leonard for four counts of first-degree murder and one count of attempted first-degree murder.

“After consulting with my staff and receiving input from the victims’ families, I have decided that my office will seek the death penalty,” Mr. Connick said.

Leonard, 33, is charged with the March 6 deaths of Kristina Riley, 32, her 14-year-old daughter, her 10-year-old son and her 9-year-old niece. He also is charged with attacking another of Ms. Riley’s daughters, a 12-year-old girl who survived.

Leonard additionally is charged with obstruction of justice.

In keeping with office policy, there will be no further comment on this open case.

Assistant District Attorney Kellie Rish is leading the prosecution.