The road rage rampage ran through Cumberland, Harnett and Wake counties.
Shareef has pleaded not guilty by reason of insanity to the murder charges. If convicted, he could face the death penalty.
In closing arguments Friday, both sides argued it wasn't so what happened, but why.
"He was having a severe psychotic episode he was in full blown psychosis, because he was suffering from severe untreated schizophrenia," defense lawyer Carl Iverson said.
"Was the defendant sane," prosecutor Rita Cox asked. "At the time did he understand, did he have a mental defect that did he understand the nature and consequences of his act and from everything we showed you, he did."
Through much of the trial, Shareef has been very docile, showing little - if any - emotion.
Meanwhile on Monday, as jurors made several requests to review documents and evidence, the strain and anxiety was apparent on the faces of his alleged victims and relatives.
Deliberations will continue Tuesday morning.