Prosecutors will seek death penalty for brother charges with killing 5-year-old boy, mother

OMAHA, Neb. – Prosecutors plan to seek the death penalty for a Nebraska man charged with killing his mother, throwing his 5-year-old half brother in a river and leaving his 11-month-old half brother in a dumpster.

Douglas County Attorney Don Kleine said Monday that several aggravating factors exist in the case against 25-year-old Roberto Martinez-Marinero.

Authorities say Martinez-Marinero surrendered to police Thursday and said he’d stabbed his mother, 45-year-old Jesus Ismenia Marinero.

The 25-year-old man also said he’d thrown Josue Ramirez-Marinero in the Elkhorn River and put Angel Ramirez-Marinero in the dumpster.

Authorities found a body Monday that investigators believe is Josue.

Angel was found bruised but alive Wednesday in the dumpster in La Vista. His mother’s body was found Wednesday night in a southeast Omaha ditch.

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