Sammy Yatim was standing 4.906 metres away from Const. James Forcillo before he took a step towards the front of the streetcar.

He was 4.541 metres away from Forcillo when the officer fired his first shot after telling Yatim that if he took another step, he’d shoot.

From the point of Forcillo’s police-issued Glock to Yatim, it was 3.706 metres.

The trial has heard Forcillo shot Yatim eight times as the 18-year-old was at the front of an empty streetcar holding a four-inch switchblade. Forcillo is now on trial for second-degree murder and attempted murder. He has pleaded not guilty to both charges.

The distances between Yatim and Forcillo — measured torso to torso and accounting for elevation — come from a 3D computer model meticulously constructed from scanning the crime scene using lasers.

Using the videos of the shooting, expert Eugenio Liscio testified that Yatim moved about 50 centimetres before he was shot. At his average speed of .357 metres per second, it would have taken him just over 11 seconds to reach Forcillo — but Liscio noted that he could not tell if Yatim was accelerating or decelerating or what his speed at the moment of the shooting was.

The defence suggested earlier in the day that Yatim could have covered that distance in less than two seconds — a key part of establishing how much of a threat Yatim posed to Forcillo.

The jury also heard more from the TTC driver who remained on the streetcar with Yatim on July 26, 2013, until police arrived.

Chad Seymour testified on Monday that he had a conversation with Yatim, who asked to use a phone to call his dad. Seymour reassured Yatim that everything would be OK and suggested he sit down.

Seymour testified Tuesday that he felt he was in an extremely frightening and dangerous situation.

Under cross-examination by Forcillo’s lawyer, Peter Brauti, Seymour said he’d thought Yatim might be high.

“He seemed like he was in a daze,” Seymour said. The jury has heard that Yatim had “moderate to moderately high” levels of ecstasy in his system at the time of his death.

Seymour agreed with Brauti that he was concerned Yatim would attack him at any moment. He also agreed that the reason he didn’t give Yatim the phone he had in his pocket was to avoid getting too close to the knife-wielding teenager. He was stalling until the police arrived, he said.

Yatim was prepared to be “compliant” as he waited for the phone, Seymour agreed, but he did a “complete 180” when the police arrived.

Brauti suggested that Seymour did not get off the streetcar when he could because he was worried Yatim would also get off and possibly start “stabbing people left, right and centre.”

Seymour agreed.

When he ran off the streetcar as Yatim came towards him yelling “you f---, you f---,” Seymour said, he was concerned Yatim would follow him off the streetcar and stab him.

Yatim remained on the streetcar and never got onto the steps, the jury has heard.

The judge issued a special instruction to the jury that they are not to “infer from Seymour’s state of mind, the state of mind of any other person.”

Seymour testified that he heard the police commands of “drop the knife, drop the knife,” and that they were not surprising in tone or volume.

When Yatim responded by calling officers “p---ies” he looked “angry, upset and aggressive,” Seymour agreed.

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“Like he was not backing down in any way?” said Brauti. Seymour agreed. He told the Crown his impression of Yatim’s demeanour came from the tone of his voice and his words, as well as that he did not drop the knife nor lower it to his side.

Thinking the situation was going to end badly, Seymour began walking away from the streetcar, his hands held up to his head in disbelief.

“Usually when a cop does that sort of thing, you want to think people listen and surrender,” he said.

Brauti asked the streetcar driver if he was aware his conduct was brave and that he’d put himself at risk to help others. Seymour quietly responded, “yes.”

The court also heard from Aaron Li-Hill, the passenger on the streetcar who held his bike between himself and Yatim.

Li-Hill said that, as panicked passengers fled, Yatim said: “Nobody get off the f---ing streetcar.”

His tone was “assertive, loud, intense” and the knife was in his right hand, the blade pointed upwards.

His eyes, Li-Hill said, appeared wide open, glazed and not focusing on anyone in particular. He appeared to be high or mentally unstable, Li-Hill said, as though “this person wasn’t well in this moment.”

Li-Hill used his bike as a shield between him and Yatim as he moved to get off the streetcar, he said. He was prepared to throw the bike at Yatim if he lunged forward. Yatim did not.

When Li-Hill said, “Please just let us go, let us get off the streetcar,” Yatim did not respond, he said.

Li-Hill got off the streetcar safely but noticed the driver was still on board. When Yatim noticed this, he seemed “unfazed” and continued yelling obscenities out the front doors to no one in particular, Li-Hill said.

Li-Hill and his panicking girlfriend left the scene shortly after. While on a side street close by, he heard the shots.

He said he thought: “I can’t believe this has escalated so fast.”

The trial continues.