BALTIMORE — Prosecutors say it would have taken just two clicks for Officer William Porter to save Freddie Gray’s life: one click to buckle him into the back of a transport van and another click of his police radio to call for medical help. Porter’s lawyers say he’s not to blame for Gray’s death, which has roiled Baltimore for months.

Gray died April 19, a week after his neck was broken while he was in the back of a police van with his wrists and ankles shackled.

“Is two, three, four seconds worth a life?” prosecutor Janice Bledsoe asked the Baltimore jury Monday during Porter’s trial.

Jurors will have to determine who they believe most: the prosecutors who say Porter is an indifferent cop and criminally responsible for Gray’s fatal spinal injury, or the defense attorneys’ characterization that he is a falsely accused police officer who asked after Gray and told his supervisors to bring the man to the hospital.

Porter faces charges of manslaughter, assault, reckless endangerment and misconduct.

Jurors began deliberations Monday after a two-week trial.

Prosecutors have had to prove criminality by inaction.

His defense countered that the case is based on conjecture, and there is no evidence Porter caused Gray’s death.

Porter testified that Gray showed no signs of pain or distress before he arrived at the police station critically injured.

Prosecutors said this was a blatant lie.

“Freddie Gray went into the van healthy and he came out of the van dead,” prosecutor Janice Bledsoe reminded jurors.

The transport van “became his casket on wheels” after Porter repeatedly denied Gray medical care and left him handcuffed and shackled but unbuckled, Bledsoe said.

Gray was arrested while fleeing police in his neighborhood, just seven city blocks from the station, yet police stopped the van repeatedly during a circuitous trip around West Baltimore that stretched on for 45 minutes.