SAN ANTONIO – Gruesome testimony from a police homicide detective is giving jurors their first detailed look at what investigators say happened in the killings of a pregnant teen, her boyfriend and their unborn son more than two years ago.

Christopher Preciado is accused of killing Savanah Soto, Matthew Guerra and their unborn son, Fabian, in what prosecutors say was connected to an apparent drug deal. The trial has reached the end of its first week, with witnesses now describing key moments in the investigation.

RELATED | New evidence shown in case of man accused in deaths of pregnant teen, boyfriend

SAPD homicide Detective Jeremy Goodwin testified about the moment he discovered Soto and Guerra’s bodies inside a car. With the families of Soto and Guerra listening, prosecutors asked Goodwin to walk the court through what he saw when he opened the passenger-side door and found Soto.

“She had been sitting in that position and she had lavidity which is a pooling of blood as your sitting there the pooling of blood at the lowest part,” Goodwin said.

Goodwin also testified that Soto had “a baby carrier on top of her with some papers mail” and that there were items “underneath that.”

RELATED | Capital murder trial begins in killing of pregnant teen, boyfriend, unborn child

He then described Guerra’s position in the vehicle, saying Guerra’s legs were over the center console and his pants were covered with blood. Goodwin said it appeared Guerra had a lighter on his lap.

“His body was hunched over his left arm was hanging down his right hand near his groin I noticed the apparent bullet defect in his head,” Goodwin said, adding, “And it appeared there was that black ring around it.”

RELATED | Jury selection begins for man accused of killing pregnant teenager, boyfriend

The trial is set to resume next week with extra security. Christopher Preciado’s father, Ramon Preciado, and mother, Mytra Ramano, were also in court and were escorted in. Ramon Preciado is accused of helping Christopher Preciado move the bodies, and a date for his trial has not been set.