Shareef is accused of a hit-and-run rampage that killed Lionel Bass in 2004. Shareef pleaded not guilty by reason of insanity.
His wife, Talethia Shareef, recently testified that Abdullah radically changed before the crime. She says her husband "lost it" after his mother died and they had financial problems. She says his behavior became violent.
"He pulled a gun on me and told me he was going to kill me," Talethia testified. "He hit me with the gun."
Investigators say Abdullah ran over five people intentionally in 2004 using stolen vehicles. His fourth victim, Lonel Bass, died as a result of the injuries sustained, including broken bones and hemorrhaging in his chest cavity.
Seth Thompson, the last victim that was hit that day, also testified.
"The driver floored it, and he hit me with the truck, knocked me down and drug me 40 to 45 feet underneath the front of the truck," Thompson said.
If convicted, Shareef could get the death penalty.