The man charged with killing four Omaha people last summer appeared thinner and agitated at a hearing Wednesday to determine whether he is competent to stand trial.

Nikko Jenkins insisting several times _ despite his lawyers' attempts to quiet him _ that the judge hear his complaints that prosecutors had violated his constitutional rights.

Douglas County District Judge Peter Bataillon explained that he could not consider those complaints until he determined whether Jenkins is competent to face first-degree murder and other charges against him.

A psychiatrist who evaluated Nikko Jenkins three years before Jenkins was accused of killing four people in and around Omaha last summer has testified that Jenkins "is a psychopath.''

Dr. Eugene Oliveto, who serves as a psychiatrist for the prison system in Douglas County, testified over the objections of prosecutors. Oliveto says he took it upon himself to re-evaluate Jenkins on Monday after being subpoenaed by Jenkins' lawyers.

Oliveto declared that Jenkins is "one of the most dangerous people I have ever evaluated.''

Oliveto is not a forensic psychiatrist and did not testify to Jenkins' competency to stand trial. But he said his Monday evaluation of Jenkins found him to be schizophrenic, among other things.

Jenkins is charged in the deaths of Juan Uribe-Pena, Jorge Cajiga-Ruiz, Curtis Bradford and Andrea Kruger. Prosecutors say the four were killed in three separate ambushes over a 10-day period in August, just days after Jenkins was released from prison on July 30th.