A latent fingerprint examiner for the FBI has testified at the trial of Boston Marathon bomber Dzhokhar Tsarnaev that his older brother’s fingerprints were found on two pieces of cardboard that came from one of the bombs at the marathon.

Elaina Graff was called Tuesday as a witness for the defense.

She says Dzhokhar’s fingerprints weren’t found on any of the marathon bomb components, but prints belonging to him and his brother, Tamerlan, were found on another bomb recovered from the scene of a gun battle with police days after the marathon attack.

Tamerlan died after the shootout.

Graff said only Tamerlan’s prints were found on other items, including a transmitter used in one of the marathon bombs and a jar of nails.

(AP)