LANSING, Mich. (WLNS) -- The fate of Okemos teen, Connor McCowan, is now in the hands of the jury.
The 19-year old is charged with murder in the Feb. 23 stabbing death of Michigan State University senior Andrew Singler. Singler was dating McCowan's older sister, Shay McCowan, at the time.
The fatal fight stemmed from a text messaging argument. Police say McCowan stabbed Singler up to three times. McCowan says it was self-defense and he only stabbed Singler after being repeatedly punched in the head.
Final witnesses were called back to the stand Monday morning, before attorneys began their closing arguments. Defense attorney Chris Bergstrom called Okemos athletic trainer, Mike Johnston, to the stand. Prosecuting attorney, John Dewane, briefly called upon Singler's ex-girlfriend, Mia Deagostino. She testified that Singler was never abusive or violent during their more than three-year relationship. Dewane also called Tyler Aho briefly back to the stand for further testimony.
During closing arguements, the defense told jurors it's unclear the direction the knife stabbed Singler, and he could have pushed himself into the McCowan's knife during the fight.
"At a minimum he's guilty of second degree murder," said the prosecuting attorney. "Intent to kill can be formulated in a second, "and that's first degree murder."
The prosecution argues McCowan went to Singler's Meridian Township apartment with the conscious decision to bring the knife that ultimately led to Singler's death. He says McCowan had the intent to kill and asks jurors to charge him with murder.
The defense is arguing McCowan acted in self defense and says McCowan only stabbed Singler after being punched repeatedly. "Just because Connor was stupid doesn't mean he committed a crime. He didn't commit a crime," said Connor McCowan's Defense Attorney.
The jury must decide if McCowan is guilty of 1st or 2nd degree murder, voluntary manslaughter, or if he acted in self-defense. Jury deliberations are expected to continue Tuesday at 9a.m.