The Forensic Doctor Better Than a Detective

”Every step of the operation, every discovery, must be based on meticulous observation and scientific methods.”

After a brief pause, He extended his hand and said, ”Give me two cotton swabs.”

The assistant quickly handed over ordinary cotton swabs, but Jiang An supplemented, ”Make sure they’re sterile.”

He continued to explain to everyone, ”Our current task is to confirm as much as possible whether the deceased was violated before death.”

”Ideally, the location for evidence extraction is the mucous membrane of the vulva, but that area is now severely charred and cannot be effectively examined.”

”While the uterus still has residues, particularly if certain biological components remain in the cervix or deep in the uterine cavity—such as DNA in silent residues—that would be highly valuable for identification.”

Zhang Yean nodded in agreement, her expression becoming equally serious, ”Indeed, if we can extract relevant biological traces from here, it would undoubtedly greatly push the case forward, even directly related to conviction.”

”Such physical evidence is often more reliable than confessions or circumstantial evidence.”

In fact, this has been Jiang An’s focus since taking over the case.

Finding the suspect is important, but accurately and scientifically proving their crime is often the key to solving the case.

Fire represents warmth and light, but it can also be an accomplice to destruction and cover-up; many pieces of evidence are damaged or even vanished.

At this moment, Jiang An, while organizing his laboratory records, continued calmly, ”Details often determine success or failure, particularly in forensic examinations.”

”Go get the PSA from the reagent cabinet.”

”PSA? What’s that?”

A young assistant looked up, asking curiously.

She had just been transferred to the lab and was unfamiliar with some technical terms.

Jiang An turned around, patiently and clearly explaining, ”PSA stands for ’Prostate-Specific Antigen Test Kit.’”

”We use this reagent to test samples from a woman’s lower body, primarily for preliminary screening to determine if she was violated before death.”

”Its principle is to detect whether the sample contains prostate-specific antigen, which typically originates from semen.”

While speaking, Zhang Yean had already turned to the reagent cabinet, skillfully retrieving a sealed test kit.

Next, she efficiently opened the package, taking out a small bottle of transparent solution and a white test strip.

Jiang An used the cotton swab with the previously collected sample to stir in the bottle’s liquid several times to ensure the sample was fully dissolved.

Then, glancing at the clock on the wall, he calmly said, ”Wait 10 minutes.”

The laboratory was silent, with only the faint sounds of the instruments operating.

As time passed minute by minute, everyone held their breath, occasionally glancing at the test strip gradually reacting.

After 10 minutes, Zhang Yean gently picked up the test strip, and everyone quickly gathered around—two distinct red lines were clearly visible on the strip, indicating a positive reaction.

Zhang Yean couldn’t help but exclaim, ”Positive!”

Although He was not a professional forensic expert, He was very familiar with the significance of such basic testing through years of criminal investigation work.

The results indicated that the sample indeed contained prostate-specific antigen.

Jiang An nodded, responding with a serious expression, ”This means there are male biological elements in the deceased’s body.”

”Next, we will conduct further confirmatory tests for sperm and DNA extraction from uterine contents.”

”Once STR typing is successfully extracted, the case will make significant progress.”

He paused, adding with a deeper tone, ”Such biological evidence can often directly point to the suspect, even becoming key in identifying the real culprit.”

Meanwhile, Wan and Qin Feng were leading the special investigation team members, driving to the school where the deceased, Zhang Qian, had studied, to conduct thorough external investigation work.

As the police car entered the school’s gate, it was recess time, the noise of students scattered around the campus in stark contrast to the solemn atmosphere inside the car.