BALTIMORE (WJZ) — There’s a decision in the trial of a man charged with killing an off-duty police detective. 

Weijia Jiang reports jurors found Sian James guilty of involuntary manslaughter.

READ MORE: Owusu Leads No. 8 Maryland Women Past Purdue 86-71

James testified he threw a concrete block at Detective Brian Stevenson in self-defense during a dispute over a parking space.  Stevenson was out celebrating his birthday in Canton when he and James got into an argument. 

James said the rock-throwing was self-defense and he thought the officer was going to shoot him.  He said the officer was threatening him and his friend.

READ MORE: Anonymous Donor Pledges to Match Donations Up To $1,000 To Help Replace Stolen Salvation Army Red Kettle

“Facts indicated he was surrounded, he feared for the life of his friends and his life,” said defense attorney John Denholm.

Jurors found James not guilty of first- and second-degree murder and not guilty of voluntary manslaughter. 

Stevenson’s family say this is not the outcome they were hoping for.  They were stunned and broke down in the courtroom.

The sentencing is set for July. James faces a maximum penalty of 10 years.

MORE NEWS: ATM Stolen In Elkridge Smash And Grab; Stolen Van Used Was Found In Baltimore, Police Say

Stevenson was an 18-year veteran of the police department.  He leaves behind a wife and four children.