Halifax Regional Police and RCMP have laid a first-degree murder charge in the case of a fatal shooting in Halifax's north end last month.

Dylan Peter Roach, 20, has been charged with first-degree murder in the death of Corey Lucas, who was shot and killed at a building on Clifton Street on May 25. Roach is also charged with the attempted murder of William Hawes-Boliver, who was shot and injured in the same incident.

Roach is currently in custody at the Central Nova Scotia Correctional Facility and is expected in Halifax provincial court on Tuesday.

A second person — Jenna Karlene Piercy, 27 — has been charged with accessory after the fact in Lucas's death. She is expected in Halifax provincial court later on Monday.

Piercy, who was arrested on Friday in Fall River, was also charged with drug possession for the purpose of trafficking as a result of a search conducted on May 28 at a residence on Kelly Point Road in Prospect.

"Much of the violence we are seeing in HRM is the result of competing street-level drug dealers who are using firearms more aggressively and violently than in the past to settle their disputes," RCMP Chief Supt. Jean-Michel Blais told reporters on Monday morning.

"While many people turn a blind eye to drug activity, the reality is that with drugs comes violence and this case is an unfortunate reminder of that."

In the days after the shooting, Hawes-Boliver told CBC News the ordeal began when two men stormed into his home. He said one of the intruders shot him in the leg with a silver .25-calibre automatic handgun before turning the weapon on Lucas.

Halifax Regional Police have said the shooting was related to drugs and was not random.

Two weeks after the shooting that killed Lucas, Halifax Regional Police returned to the property looking for drugs and weapons.

They arrested three people — including Hawes-Boliver — and charged them with possession for the purpose of trafficking cocaine and oxycodone, possession of marijuana and possession of a prohibited firearm with ammunition.