Graphic video footage and testimony detailing the fatal July 28, 2018, encounter between Joseph Santos and former South Whitehall Township police officer Jonathan Roselle near Dorney Park was presented to the jury during the afternoon of March 12 in the Lehigh County Courthouse.

Roselle, 34, of Parryville, has pleaded not guilty to one count of voluntary manslaughter in the shooting death of Santos, 44, of Hasbrouck Heights, N.J.

Now retired Pennsylvania State Trooper Steven Furlong testified how state police conducted an independent investigation into the shooting and obtained security footage of Santos leaving Dorney Park.

In the footage Santos is seen walking inside the park - initially with his partner, then alone - before approaching a security fence near the Hamilton Boulevard entrance.

After pacing around for several moments, Santos climbs the fence and falls to the ground outside the park.

A weaving Santos then runs down the street toward Hamilton Boulevard, arms waving, causing an oncoming car to swerve around him as he disappears off-screen.

Detective James Bruchak of the Lehigh County Homicide Task Force told the court recordings from Roselle’s dashboard and body cameras were also recovered.

On both cameras, Roselle is seen stopped on the Hamilton Boulevard median when a car pulls up and a woman hysterically says a man was screaming for help and had tried to break her window.

As Roselle responds, he calls in a possible mental situation and requests backup. As Roselle arrives on scene a bloodied, shoeless Santos is seen staggering toward the police SUV and then he begins banging on the driver side window.

Drawing his pistol and pointing it in Santos’ direction, Roselle repeatedly orders him to “get off my vehicle.”

Santos climbs on the hood and strikes the windshield multiple times, dislodging the dashboard camera.

Roselle, still training his pistol on Santos, radios that Santos is attacking his vehicle, “covered in blood” and that he would stay in the SUV until backup arrived.

Santos attempts to open the passenger door and slaps the window, leaving bloody streaks on the glass.

He then walks away as Roselle exits the SUV and orders Santos to the ground. Santos turns and walks toward Roselle, who continues to tell him to “get on the ground!”

“Don’t do it,” Santos is heard saying as Roselle opens fire, killing Santos with five shots to the head and torso.

“He kept coming, he wouldn’t stop,” Roselle says before calling for an ambulance, Santos’ body lying at his feet.

After helping responding officers perform CPR, Roselle is led to a cruiser where a trooper checks him over and disarms him.

“I think I f---ed up; he kept coming at me and didn’t stop,” Roselle tells the officer as the video ends. “I’m concerned I f---ed up.”

Two videos taken by bystanders were also shown. One captured Roselle swerving in an attempt to shake Santos off his cruiser’s hood, and the second shows Santos walking toward Roselle before collapsing to the pavement, fatally wounded.

Sitting in the front row of the courtroom, Santos’ family sobbed as the videos were played repeatedly for the jury.

Melinda Sullivan, the woman who initially alerted Roselle, testified while heading home she encountered a man, later identified as Santos, standing in front of her vehicle in the road waving his hands.

Sullivan shed tears as she recalled stopping her car and dialing 911 twice, only to hear a recording.

“The next thing I remember is the man’s body on my windshield … looking at me and screaming ‘help me,’” Sullivan said, adding Santos had a tense face and “bugged out” eyes.

She said Santos also tried breaking her driver side window with his palm.

As she tried to avoid running over Santos and get away, Sullivan said she heard him say “30 years I never hurt anyone, help me,” before falling off her car.

Defense Attorney Jenna Fliszar asked Sullivan why she felt afraid even though Santos had no weapon and made no verbal threats.

Sullivan said the experience of seeing Santos on her windshield was “traumatic,” and she feared injury if Santos managed to break her window.

“What he did scared me, his actions scared me,” she said.

Amber Stern testified she was driving behind a friends’ car when she saw Santos enter the roadway near Dorney Park, waving his hands as he approached their vehicles.

Stern said as she and her husband watched, Santos grabbed and shattered her friend’s driver side window and hung on the vehicle before falling off.

She testified Santos’ behavior initially resembled someone needing help or flagging down a car before quickly becoming aggressive.

She also said after Santos fell off, he seemed confused and had a blank facial expression.

Additionally, Stern recalled her husband making physical contact with Santos after he smashed the window but said Santos made no motion in response, which she found odd.

“To be honest, it was just really sad,” Stern said.

Under cross-examination by Fliszar, Stern said she became scared and confused upon witnessing Santos’ sudden aggressiveness, noting Santos “looked powerful” with a muscular build and she feared he could have harmed her husband and friends in the encounter.

Stern repeated Santos seemed like he needed help, waving his hands and moving unsteadily.

“His whole behavior was quite odd,” she said before Judge Kelly Banach adjourned the day’s trial.

The trial is expected to take about one week. Roselle, who remains free on $75,000 unsecured bail, faces a maximum of 20 years in prison if found guilty.