With his friend Jeffrey Conroy sitting only a few feet away, one of the four teenagers who admitted involvement in the death of Ecuadorean immigrant Marcelo Lucero testified Monday at Conroy's trial in Riverhead about a string of attacks aimed at Hispanic men.

Speaking calmly at Conroy's murder and manslaughter trial in Suffolk County Court, Nicholas Hausch, 18, of Medford, described five incidents within 24 hours over two nights in which he and friends attacked Latinos - culminating in the stabbing death of Lucero, 37, of Patchogue, on Nov. 8, 2008.

During more than two hours of testimony, Hausch contradicted the testimony of two men who said they were attacked before Lucero was killed. Hausch also contradicted his own testimony at least once, and under cross-examination said he pleaded guilty to crimes he did not commit.

Conroy, 19, of Medford, has pleaded not guilty to second-degree murder and first-degree manslaughter, both as hate crimes. Prosecutors say he, Hausch and five other teens confronted Lucero before Conroy stabbed him to death.

Conroy is the only one of the seven teens charged with murder and manslaughter.