Homicide

Cousin gives Hernandez big smile from witness box, says she can't recall details after killing

  • Witness Jennifer Mercado, a cousin of defendant Aaron Hernandez, smiles while testifying about their relationship during the murder trial of the former New England Patriots NFL football player at Bristol County Superior Court, Tuesday, March 24, 2015, in Fall River, Mass. Hernandez is charged with killing semiprofessional football player Odin Lloyd in June 2013. (AP Photo/The Boston Globe, Aram Boghosian, Pool)

    Witness Jennifer Mercado, a cousin of defendant Aaron Hernandez, smiles while testifying about their relationship during the murder trial of the former New England Patriots NFL football player at Bristol County Superior Court, Tuesday, March 24, 2015, in Fall River, Mass. Hernandez is charged with killing semiprofessional football player Odin Lloyd in June 2013. (AP Photo/The Boston Globe, Aram Boghosian, Pool)  (The Associated Press)

  • Witness Jennifer Mercado, a cousin of defendant Aaron Hernandez, testifies during the murder trial of the former New England Patriots NFL football player at Bristol County Superior Court, Tuesday, March 24, 2015, in Fall River, Mass. Hernandez is charged with killing semiprofessional football player Odin Lloyd in June 2013. (AP Photo/The Boston Globe, Aram Boghosian, Pool)

    Witness Jennifer Mercado, a cousin of defendant Aaron Hernandez, testifies during the murder trial of the former New England Patriots NFL football player at Bristol County Superior Court, Tuesday, March 24, 2015, in Fall River, Mass. Hernandez is charged with killing semiprofessional football player Odin Lloyd in June 2013. (AP Photo/The Boston Globe, Aram Boghosian, Pool)  (The Associated Press)

  • Witness Jennifer Mercado, a cousin of defendant Aaron Hernandez, becomes emotional as she testifies during the murder trial of the former New England Patriots NFL football player at Bristol County Superior Court, Tuesday, March 24, 2015, in Fall River, Mass. Hernandez is charged with killing semiprofessional football player Odin Lloyd in June 2013. (AP Photo/The Boston Globe, Aram Boghosian, Pool)

    Witness Jennifer Mercado, a cousin of defendant Aaron Hernandez, becomes emotional as she testifies during the murder trial of the former New England Patriots NFL football player at Bristol County Superior Court, Tuesday, March 24, 2015, in Fall River, Mass. Hernandez is charged with killing semiprofessional football player Odin Lloyd in June 2013. (AP Photo/The Boston Globe, Aram Boghosian, Pool)  (The Associated Press)

A cousin of former New England Patriots player Aaron Hernandez has taken the stand in the murder trial after being ordered by the court to do so, but she has repeatedly said she can't remember.

Jennifer Mercado was granted immunity from prosecution before testifying Tuesday. She gave Hernandez a big smile from the witness box.

Hernandez is charged with the June 2013 killing of Odin Lloyd, who was dating his fiancee's sister.

Mercado's sister, Tanya Singleton, pleaded guilty to criminal contempt for failing to testify before a grand jury. Singleton has pleaded not guilty to helping a Hernandez co-defendant flee after the killing.

Mercado repeatedly said she couldn't remember what happened in the days after the killing.

She also said she couldn't remember details she recalled for the grand jury.