'We Are Very Worried:' Blood Found Splattered Around Missing Mother's Bronx Home

NEW YORK (CBSNewYork) -- A mother has been missing for days and disturbing discoveries inside her apartment and car have the 52-year-old's family desperate for answers.

"I haven't seen her since Monday. It's Thursday today, right?" Nicholas Duverge said. "I can't sleep, I can barely eat, it's terrifying."

Duverge can barely keep track of the days since his mom went missing. Police said Viau left her apartment on Carlisle Place in the Bronx with her other son, Joseph, to go to a doctor's appointment at the VA facility on Kingsbridge Road.

"She has rheumatoid arthritis," Duverge told CBS2's Jessica Layton, "I just feel like something's wrong."

Viau was reported missing Wednesday by her boyfriend of 15 years. 

On Thursday afternoon, he wasn't inside the apartment they share, but police were. Sources told CBS2 that Viau's purse and cell phone were found inside the apartment with blood on them. There was also what appeared to be blood on the door leading to the hallway.

Sources told 1010 WINS' Carol D'Auria that Viau's boyfriend found her car not far from the apartment with blood on the rear seat and a bloody palm print on the ceiling. The boyfriend is no longer cooperating with police, D'Auria reported.

"I don't' want to assume the worst, but at this point that's all I can think about," Duverge said.

The 22-year-old can't imagine who would want to hurt his mother, and is holding onto the hope that she'll still walk through the family's door with an explanation.

"She goes out of her way to help everyone she knows," he said. "We are very worried, our family is worried, just want her to get home safely."

Neighbors say they're worried too.

"It's definitely scary. I have a 3-year-old and I've been hearing strange activities upstairs," Beatriz Albino said. "I'm afraid to live in this building."

Viau is 5'7" 135-lbs with brown eyes and salt and pepper hair. She was last seen wearing a pink shirt and black pants.

"If she's seeing this, I love her very much and I want her to come home," her son pleaded.

Sources told CBS2 both Viau's boyfriend and other son, Joseph, have a violent history, but neither have been named as a suspect.

Police have asked anyone with information in the case to contact them.