PICTURED: The grisly photo of smirking son showing off his mother's head after 'he chopped up her corpse with a power saw'

• Bahsid McLean, 23, is charged with murdering his mother Tanya Byrd, 45, and chopping up her body into pieces
• Cops found gruesome pictures of the man and his mother's body on his cell phone
  
• Byrd's head, torso, hands, and leg were found in at least four travel and plastic bags strewn among garbage in South Bronx
• Pal William Harris, 26, is charged with helping to cover up the grisly crime
• McLean wore a black plastic garbage bag to court on Friday and made several outbursts
• He is on suicide watch and hadn't been taking his medication, his lawyer said
  

By HELEN POW and DAILY MAIL REPORTER

PUBLISHED: 15:58 GMT, 2 March 2013 | UPDATED: 16:34 GMT, 2 March 2013

A gruesome photo emerged on Saturday showing the Bronx man accused of killing and dismembering his mother's body, smiling and displaying the head of the dead woman. 

Bahsid McLean, 23, posed in front of the bathroom mirror holding the bloody head of his slain mother, Tanya Byrd, like a trophy and used his phone to snap the grisly photo as a keepsake, in the image leaked to the New York Post. 

McLean has been charged with killing Byrd, 45, after an argument in which the mother told her son to grow up and move out of her apartment in the Morrisania neighborhood in the South Bronx.

A law enforcement official said the shocking photo is just one of several images found on McLean's cell phone. 

'I lost sleep over it. Just sheer inhumanity. It’s horrible what he did to her,' the source told the Post.

Police say that after McLean stabbed the woman to death, likely on late Saturday or on Monday, he cut up her body with a power saw and scattered the body parts around his Bronx neighborhood.

Then he and a pal allegedly stuffed the woman's body parts into three heavy-duty garbage bags, some of which were zipped inside luggage, and dumped them in at least four different locations in Morrisania, where they were discovered early Tuesday morning by a dog-walker.

McLean appeared in court on Friday for his arraignment, claiming that 'didn't do anything wrong.'

Wearing a black plastic garbage bag to the hearing because he kept urinating on himself, he is being held on suicide watch after the horrific attack earlier this week on his mom.

The mentally ill man told the judge that Byrd was dying and that he was trying to help her, though it was unclear what she was supposedly dying of.

McLean's defense attorney Jerry Iannece said his client, who is undergoing a psychological evaluation, was off medication but he didn't disclose what the 23-year-old had been taking.

The lawyer admitted it was a 'troubling' case but insisted to CBS News that his team would 'investigate it and defend it thoroughly.'

During the court appearance, McLean made several other outbursts and was ultimately ordered held without bail.

He's definitely sick,' a law-enforcement source told The Post. 'It's a ghoulish act. This guy is so mentally defective to do that. That's pretty outrageous. That's hardcore s***.'

Police say McLean, whose Twitter handle is @killtanyabyrd, stabbed his mother to death in the bedroom of the apartment they shared on either Sunday night or Monday morning. It is not clear whether McLean's seven-year-old brother Nasyr, who has Down's syndrome, was home.

The gruesome pictures, discovered by cops on his cell phone, and an initial confession led to McLean's murder charge on Wednesday.

Byrd's sister Cassandra McLean told The New York Daily News that the mother-of-three had caught McLean scouring the Internet for how to tips on covering up a murder and that he later created a MySpace page called 'Kill the b**** Tanya.'

Police say McLean murdered his mother because she 'wanted him to grow up and move out and be a man,' The Post reported.

His aunt said her nephew harbored resentment towards his mom after he was placed in a foster home while she battled a drug problem. He came back to live with her when he was 18. He was also suspected of abusing his younger brother, whose body began displaying bruises.

His friend, William Harris, 26, allegedly helped him get rid of the body. The pair were reportedly caught on surveillance video at a nearby hardware store where they bought a power saw with cash.

A blade and a box were found in the apartment McLean shared with his mother while the saw - 2-foot-long Black and Decker jigsaw - was found at Harris' home, sources said.

Cassandra McLean labelled the 23-year-old a 'monster' who had been plotting his mother's murder. 'My nephew is a monster,' she told the Daily News. 'This murder was premeditated.'

She said he deserves the death penalty. 'He took away one of God's angels, and for that he deserves to go to hell.'

Even his father said he was a bad egg.

'He did destructive things,' James McLean told the Daily News. 'He set fires; nobody could control him.' 

A photograph on his Facebook page shows him burning a scarf.

FULL STORY + PICS + VIDEO: http://www.dailymail.co.uk/news/article-2287038/Tanya-Byrd-The-gris...