In the case this thread discusses the perp was a homeless black man...
But I don't think that we can say that only homeless black people stab others.
A quick google search turned up the following incidents:
http://www.kxxv.com/story/23382252/homeless-man-stabs-another-homeless-man-after-running-out-of-beerTEMPLE -
A 50-year-old homeless man was arrested for stabbing another homeless man after they ran out of beer.
Douglas William Warden has been charged with aggravated assault following an incident in the 400 block of S. 6th St. on Saturday.
The victim walked into the lobby of the Temple Police Department at 9:45 p.m. Saturday night, and reported that he had been stabbed. He told police that he was homeless and living in a vacant building with other homeless people.
A homeless white guy in Ireland stabs someone...
http://www.independent.ie/irish-news/video-cctv-footage-of-dublin-stab-victim-before-death-29612709.htmlThis is the final CCTV footage of former publican John Maguire before he was stabbed to death.
Mr Maguire was murdered two days later on Monday.
Gardai investigating the brutal murder of Mr Maguire in Smithfield on Monday now believe a homeless man could be the killer.
They believe that a person living on the streets, and who was possibly known to the 51-year-old former publican, could be responsible for the frenzied stabbing in the hallway of his Ormond Square home.
http://www.radionz.co.nz/news/regional/220367/homeless-man-fatally-stabbed-police
http://www.utsandiego.com/news/2013/sep/22/man-stab-pacific-beach/PACIFIC BEACH — A man was stabbed in Pacific Beach on Saturday evening, police said.
Two men got into an argument while walking toward a homeless camp around 5:30 p.m. near Garnet Avenue, according to San Diego police.
One man stabbed the other with a tool and fled west on a red bicycle.
The suspect was described as a white man in his 30's, 5 feet 11 inches tall and wearing a blue flannel shirt and dark pants.
The stabbing victim was taken to a hospital for his injury.
http://www.wkbn.com/2013/09/13/homeless-man-convicted-of-murder/A homeless man described by prosecutors as a “vagabond” and a heroin addict was convicted Friday of fatally stabbing a Warren man.
Richard Clark, 39, was convicted in Trumbull County Common Pleas Court of aggravated murder and aggravated robbery after a week-long trial in front of Judge Ronald Rice. The jury deliberated for less than 90 minutes.
Clark could face a life prison sentence for the murder conviction when he is sentenced next month.
Clark was convicted for stabbing Dwayne Hickman in his Williamsburg Street N.W. home where he had been dead for about two days, assistant county prosecutor Chris Becker said.
You get the picture...