WESTERLY — Local law enforcement agencies continue to search for a Norwich man who is accused of fatally shooting his cousin at point-blank range in the doorway of a Marriot Avenue home on Saturday afternoon.

The Westerly Police Department has obtained an extraditable warrant for the man, identified late Saturday night as Louis M. Seignious Jr., 31, of Boswell Avenue in Norwich. Police Chief Shawn Lacey said detectives have been working with family members in an effort to locate Seignious, who led officers in Ledyard on a brief car chase Saturday evening before fleeing into a wooded area by foot.

Lacey said Seignious has ties to both the Norwich and New Haven areas and is considered armed and dangerous.

"Our main focus at this stage of the investigation is to track (Seignious)," Lacey said. "We obtained an extraditable warrant for first-degree murder overnight (Sunday) that will allow him to be taken into custody no matter what state he may be in."

According to police, officers were called to 11B Marriot Ave. at 3:55 p.m. Saturday on a report that 28-year-old Vincent A. Sebastian, of Fanning Road, Ledyard, had suffered a single gunshot wound to the chest. The scene was quickly secured, Lacey said, and personnel with the Westerly Ambulance Corps responded to treat the victim.

After several unsuccessful attempts to revive Sebastian, he was pronounced dead at the scene at 4:29 p.m.

A preliminary investigation determined that Sebastian, who the police said had an active relationship with a woman who lived at the address, was there with the woman, three children age 10 and under, and another man when Seignious arrived at the home. The two had a verbal argument at the front door of the home, he said, before Seignious fired one shot and drove away. Lacey said he did not believe the children witnessed the shooting.

The police said the victim and the suspect are cousins, and Seignious had a child with the woman. The incident is considered a domestic case, Lacey said.

Lacey said Sunday that the investigation revealed the two men had "once been close," but grew apart after they were each charged, along with two other men, in connection with a Norwich-based burglary in June 2018.

Shortly after the shooting Saturday, the Mashantucket Tribal Police spotted and pursued the suspect's car, and Seignious jumped out of the vehicle and fled into a wooded area of Ledyard. Residents in the area of Shewville Road and Coachman Pike were warned by the police to stay indoors. K-9 officers with several area towns responded to track Seignious, but the search was unsuccessful.

Lacey said Ledyard police took custody of Seignious' car and the department has applied for a warrant. The car was expected to be turned over to Westerly police on Monday for processing.

Westerly detectives processed the crime scene, and the Rhode Island Medical Examiner’s Office responded and removed the body. The scene was turned back over to the woman Sunday morning, Lacey said.

Lacey said the investigation remains active and anyone who comes across Seignious is urged to call 911 immediately. 

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