FREDERICTON -- A New Brunswick mother has issued an emotional appeal for her missing 17-year-old son, who last spoke to her more than seven months ago and whose disappearance is considered suspicious.

Amanda Frigault said in a YouTube video that she's becoming fearful she will never see her son Brayden Joseph Thibault again, and recalled that his parting words to her were, "I love you more, Momma."

"I'm angry that somebody knows what happened to him and will not come forward and I'm scared that I will never find him," she said on the video.

Frigault, who held a news conference at RCMP headquarters in Fredericton on Friday, said she is appealing to the public in hope someone familiar with what happened to Thibault will have the "courage and compassion" to come forward.

"Investigators believe someone knows what happened," the RCMP said in a tweet.

Sitting next to photos of her son when he was a little boy, Frigault said in the video that she missed his smiles, hugs, his sarcasm, his dancing with his little sister.

"I miss fighting with him about curfews and cleaning his room, but what I miss most is his kind soul and his beautiful heart," she said.

Frigault described herself as feeling helpless because she cannot provide answers or lessen the fears of Thibault's brothers and sisters.

"I remember their broken innocence when I had to tell them that Brayden wasn't just away somewhere else," she said.

He was last seen in Fredericton's northside on July 31 last year.

"If you have any information about my son or where he is, please contact the police or Crime Stoppers. Please help them find Brayden. Help them bring him home and help them begin to heal the hearts of all the people who love him," Frigault said.