A 53-year-old man was held by police, after he reportedly shot and killed his friend, who remains unidentified.
Police said the man was a US deportee.
According to police, the man said that he and the friend went to the suspect's Pacho Lane, Boundary Road,El Socorro home around 3 pm.
The duo, the man claimed, had an argument when the deceased pulled out a gun.
The man wrestled the firearm from the deceased and shot him after the deceased pulled out a second gun.
Police said the man was found seated in the garage of his home awaiting their arrival.
Both guns were found on the scene.
When the T&T Guardian arrived at the scene, the suspect was being taken into custody after Crime Scene Investigators took his clothing for evidence.
Residents described the area as quiet and said they did not know the victim or the suspect.
In an unrelated incident, two brothers were shot on Monday night leaving one dead and another in critical condition at the Port-of-Spain General Hospital.
According to police reports, around 8.30 pm Keegan Raymond, 31, of De La Marre Avenue, Trincity, and his brother Akile Jeffrey, 19, of Cameron Road, Petit Valley, were in a silver Mitsubishi Lancer driven by Nicholas Lawrence when they were attacked.
Police said as Lawrence was driving along an area known as Ravine Road, Diego Martin,when a gunman opened fire on the car. The brothers were hit but Lawrence was unhurt.
Raymond was pronounced dead on arrival at the Port-of-Spain General Hospital, while Jeffrey was warded in a critical condition.
Police had no motive for the shooting.
Speaking with the media outside the Forensic Science Centre, St James yesterday, the boys' mother, who did not want to be named, said she had no clue why anyone would want to hurt her sons.
She said she her deceased son is now in a better place as he lived a life that was pleasing to God.
The murder took the toll to 196for the year, while the figure for the same period last yearstood at 216.