FRESNO (AP) — Employees at a California chicken-processing plant returned to work Thursday as new information surfaced about the psychological history of the ex-convict who police say shot four of his co-workers before killing himself.
A Fresno County mental health evaluation in 2004 diagnosed suspect Lawrence Nathaniel Jones with intermittent explosive disorder, drug-induced psychotic disorder, and dependence on multiple substances including amphetamine, marijuana and alcohol.
Intermittent explosive disorder is a condition marked by sudden aggression that appears out of proportion to any external stress, according to the National Institute of Mental Health.
To be diagnosed with it, a person must have had three such aggressive episodes.
Jones was seen many times by jail psychiatric services staff, who described him as mentally unstable, the Fresno Bee reported.
“The majority of the contacts have been crisis-related,” wrote psychologist Adrian Della-Porta. “He has a history of acting out around his court dates. He has consistently refused medication offered to him.”
On Tuesday, in the middle of his morning shift at Valley Protein, the 42-year-old Jones pulled a gun and shot four co-workers, killing two, authorities said. Two others were wounded.