MILWAUKEE -

A trial is expected to wrap up in the case of a Milwaukee man who shot and killed his teenage neighbor last year whom he suspected of burglary.

Seventy-six-year-old John Henry Spooner was convicted Wednesday of first-degree intentional homicide. His trial is now in a second phase to determine whether he was mentally ill when he killed 13-year-old Darius Simmons last year.

Witnesses who are expected to testify Friday include a forensic psychologist hired by the state.

Spooner took the stand Thursday against his attorney's advice. He acknowledged killing Darius, saying he really wanted his guns back. He said the killing was "justice" for the burglary.

He says he killed the boy out of anger. He says he wanted to shoot the boy's older brother but other people had gathered near him.

A prosecutor asked if he felt bad about killing Darius Simmons. Spooner replied, "Not that bad."

Police searched Darius' home after the shooting and didn't find the guns.

Spooner told the investigating doctor that the boy's life would have been an even trade for taking his guns.

Spooner declined to testify in the first half of his trial. In that phase a jury convicted him of first-degree intentional homicide.

The trial advanced to a second phase to determine his mental competence at the time. Spooner took the stand against his attorney's advice.

Jurors could return a verdict as early as Friday afternoon.