Friday, the prosecution began its case, calling evidence technician Justin Gehringer with the New Hartford Police Department to take the stand. He also testified at many of the pre-trial hearing for the Word of Life Church beating defendants. Cara Thomas has details from the day in court.

UTICA, N.Y. -- Testimony is underway in Oneida County Court where the first suspect in the Word of Life Church beatings case is on trial.

Sarah Ferguson is charged with depraved indifference murder for the death of her half-brother, Lucas Leonard.

Friday, the prosecution began testimony, calling evidence technician Justin Gehringer with the New Hartford Police Department to take the stand. He also testified at many of the pre-trial hearing for the Word of Life Church beating defendants.

Gehringer says he responded to St. Luke's Hospital on October 11, 2015. A crime scene had been taped off. He said he went to where the victim was, and his injuries were initially described as a possible gunshot wound. He testified that he took photos of victim and the white van in the parking lot.

The van, which was photographed, is the vehicle they used to bring Lucas Leonard to the hospital.

Several bloody images of Lucas Leonard's body were also shown in court, as prosecutors try to prove Ferguson took part in the brutal beating that resulted in Lucas' death and her other step-brother's hospitalization.

Gehringer says Lucas' clothing appeared to be covered in blood, particularly the crotch area of his pants. He also stated blood flowed down into his sneaker. The prosecution showed graphic photos depicting the injuries Lucas sustained to his groin area.

Lucas Leonard's body was covered in bruises and cuts – as the photos show.

Gehringer went back to the police station after taking the photos. He then executed a search warrant on Bruce Leonard. He says he collected five total items from Bruce Leonard -- shoes, a sweater, pants and shirt.

On October 13, Gehringer helped execute a warrant at the Word of Life Church. He searched the sanctuary and rear part of the building for evidence.

Gehringer says in the corner of the sanctuary there was one chair sitting by itself. There was blood on the floor near the chair and paper towels. He says he also found a cord that appeared to have human hair on it and there appeared to be blood on the chair leg.

Gehringer says the cord caught his attention because one of the prongs of the plug was damaged.

The evidence he collected was then brought back to the police department and logged. He collected 14 items from the church. Police did a DNA swab of the "blood" they found on the carpet.

After the cord was brought out of evidence packaging, Gehringer showed the judge where the prongs on the cord were bent.

He measured the end of the cord where the plug is and compared them to the injuries found on Lucas' body, saying that it appeared to him that the size and shape of injuries were consistent with the plug from the cord.

The defense objected to Gehringer's testimony that the wounds are consistent with the cord -- saying he is not a medical expert. The judge allowed his testimony as just for his opinion and not as fact.

At about 3 a.m. on October 13, Gehringer testified that he met with a trooper, who gave him clothing he had collected from Christopher Leonard.

On October 14, another state police investigator turned in Bruce Leonard's cell phone. Gehringer say he did not search it; he just put it into evidence. Oneida County District Attorney Scott McNamara says cell phone is relevant to case because it was at Word of Life church on October 11, and could have been utilized to call 911, but no one did.

Inside the Lucas' wallet that was brought into evidence, Gehringer says there was a debit card, driver's license and a library card. There was also a receipt and some change.

He said there appeared to be dried blood on the wallet.

The defense began cross examination of Officer Gehringer, which remained short and only recapped earlier testimony.

The prosecution next called Alan Rahman, a security officer in the emergency room at St. Luke's Hospital in New Hartford, who said he was there when they brought Leonard to the hospital, and said someone was dying inside the van. The prosecution played security video of the parking lot outside the Faxton St. Luke's Emergency Room. 

Rahman said he and other medical staff members rushed out to the vehicle, pulled Lucas out of the vehicle and onto the ground. He said nurses began administering first aid. 

Rahman identified two of the people who brought Lucas to the hospital as Bruce and Deborah Leonard. 

Briana Fleming was the prosecution's next witness. She was a nursing assistant in October of 2015. 

Fleming was one of the people who ran out to the Leonard's van to administer first aid on Lucas. She said his body was limp and cold to the touch. Lucas did not have a pulse at that time. 

An ER nurse employed at Faxton St. Luke's Hospital was the prosecution's final witness of the day. Her name is Gretchen Scheibel. 

Scheibel said she heard other nurses were administering CPR to a patient out in the parking lot. She went outside to offer assistance.

Scheibel said the crotch of Lucas' pants were covered in blood. One of the other nurses unbuttoned his pants to try and find the source of the bleeding. They found a severe wound on Lucas' genitals.

She said none of the people who brought Lucas to the hospital would speak with her and explain what happened.

Scheibel said Lucas was dead before he had reached the hospital. She said rigor mortis had already begun setting in. She said his bruises looked fresh. There were purple bruises and dried blood all over his body.

Court will resume Monday morning at 10 a.m.