Police say three teens are now facing multiple charges after an elderly man was attacked and killed in Halifax over the weekend.

Two teens have been charged with first-degree murder in the killing of 70-year-old Glenn Francis Oakley, and a third has been charged with being an accessory after the fact.

The charges stem from a murder that occurred in Spryfield Saturday night.

Police say two women were walking across the bridge on Drysdale Road around 10:30 p.m. when they spotted Oakley lying on the sidewalk.

They called for help and a man rushed to assist them. He determined Oakley was in medical distress and called police.

"I went over and about halfway across the bridge I found a man lying there…obviously not breathing…eyes wide open," says the man, who asked not to be identified. "He seemed very cold."

He says he called 911 and the operator talked him through the steps to attempt to revive Oakley, but he was pronounced dead upon arrival at the hospital.

Police confirm Oakley died from a gunshot wound and they say a search of a building on River Road led them to seize a firearm.

Police arrested a 17-year-old male in connection with the murder around 10:43 p.m. Sunday.

He appeared in Halifax youth court today to face charges of first-degree murder, theft, possession of stolen property, fraudulent use of a credit card and possession of a weapon, but police say the charges will be need to be amended after further investigation, and they are not ruling out the possibility of laying additional charges against the teen.

The Crown says it will seek to have the teen tried as an adult in court.

"It is standard policy to give notice so that if we were to be seeking notice in the future, the accused has fair warning," says Crown prosecutor Terry Nickerson.

Police also arrested a second male youth from Spryfield in connection with the case on Monday afternoon, along with four other people whom officers say tried to obstruct them while they tried to arrest the teen.

The 18-year-old faces charges of first-degree murder as well as robbery with a firearm, possession of stolen property, fraudulent use of a credit card and possession of a weapon for a dangerous purpose.

The four people who were arrested for obstructing officers appeared in court today to face several charges including obstructing police, causing a disturbance, assaulting police and resisting arrest.

A third male youth, also an 18-year-old from Spryfield, was arrested today shortly after 12 p.m. He is facing charges of accessory after the fact and possession of stolen property.

Police say the two 18-year-old males will appear in Halifax provincial court tomorrow, and while the case is still open, they aren't looking for any additional suspects.

Oakley's wife says she is happy to hear charges have been laid.

"When the police came and told me last night that they caught the young fells, I was laughing, I was crying and I was praying to the good Lord," says Sheila Oakley.

"He was an old man. He wouldn't hurt a fly. I just want to know why they took my life from me."

With files from CTV Atlantic's Kayla Hounsell