On Thursday, jurors in a Hidalgo County murder trial heard from the suspect’s common-law wife said she was there when a Donna High School teen was allegedly shot and killed by her boyfriend at the time.

Carlos Contreras, 23, is charged in the death of 18-year-old Genaro Isaiah “Izzy” Castillo. He died on Jan. 12, 2020 and his body was found near Donna Lake by a field worker.

Miranda Luna, 21, identified herself as Contreras’ common-law wife and said she was dating Contreras at the time of the murder.

Luna was the key witness prosecutors offered immunity to without letting the defense know, triggering the judge to issue a mistrial on Friday, Sept. 12.

RELATED STORY: Family of slain Donna High School student speaks out after mistrial declared

The trial restarted on Monday.

Luna said

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