OMAHA, Neb. (AP) — A woman charged with helping her boyfriend, charged with killing his mother and 4-year-old half brother, is arguing that statements she made to police should not be allowed into evidence at her trial.

Police think 25-year-old Gabriela Guevara helped 25-year-old Roberto Martinez-Marinero load his gravely-injured mother in a car and dump her body. Police say Guevara also was with Martinez-Marinero when he dumped his then-11-month-old half brother in a La Vista dumpster and threw his 4-year-old half brother from an Elkhorn River bridge to his death.

Guevara now says her statements to police should be thrown out because she feared police and Martinez-Marinero, whom she said had abused her.

The judge is expected to rule in a few weeks on her request.