UPDATE: Chattanooga police are investigating the city's first homicide of 2018.

It happened Monday night on the 1500 block of Ryan Street, near Main Street.

Police are not releasing many details about what happened but said the person who fired the weapon had the right to do so. Hamilton County's district attorney’s office determined the death was justifiable.

"The justifiable part is where Tennessee law steps in certain situations that taking someone's life is excused under the law," said Bryan Hoss with Davis & Hoss.

Police said when they arrived at the home Monday night, they found 26-year-old Taji Webb on the ground with a gunshot wound; Webb later died at a hospital. Police said they interviewed witnesses and collected evidence showing that deadly force was necessary. However, the details of the shooting have not been released.

Channel 3 wanted to know what kind of scenario could've played out to justify a homicide, Hoss said typically self-defense would be justifiable.

"If that belief is real and your actions are reasonable then you can use deadly force to protect yourself, a family member or third party," explained Hoss.

Our Channel 3 investigation reveals that there were 34 homicides last year, and only three of them were classified as justified. In the last 5 years, there have been 13 such cases.

Channel 3 asked how Chattanooga police and the district attorney were able to determine so quickly the shooting was justified, Hoss explained, “sometimes it might take 30 minutes to decide something, sometimes it might take three years it just depends it's case by case."

Hoss said in this case, if it was self-defense in the residents' home there are even more protections for the person who used deadly force.

The Hamilton County District Attorney's office said "At this time they don't expect any charges to be filed."

Officers said this is not the first time they've encountered the man who was killed. Webb had a long criminal record dating back to 2010. He had been citedforh theft, weapon and possession charges.

PREVIOUS STORY: The man who was shot in the 1500 block of Ryan Street Monday night has passed away. 

Chattanooga Police responded to a person shot call just before 10:45 pm.

Upon arrival, officers located 26-year-old Taji Webb who was lying on the ground with a gunshot wound.

Webb was transported to a local hospital where he later succumbed to his injuries.

The CPD's Violent Crimes Bureau responded to the scene to investigate the incident.

A spokesperson for the CPD said, "witnesses were interviewed and evidence was collected at the scene. As a result, there is reasonable belief this homicide is justifiable and the use of deadly force was necessary."

Investigators have consulted with the Hamilton County District Attorney's Office and determined that charges should not be filed at this time. 

This is the first homicide in Chattanooga this year.

PREVIOUS STORY: According to Chattanooga Police, one person has been hurt in a shooting late Monday night.

It happened just before 11 p.m. on Ryan Street.  Chattanooga Police confirm that the victim does have life-threatening injuries.

Stay with Channel 3 as this story continues to develop.