The college student suspected of killing and eating parts of a man staying at his home ranted months ago about "mass human sacrifices" on Facebook, one of several details that emerged Friday in the second gruesome case of alleged cannibalism in the U.S. in a week.

Authorities say Alex Kinyua, 21, admitted using a knife to kill and carve up Kujoe Bonsafo Agyei-Kodie, 37, before eating his heart and parts of his brain. The older man had been staying with the Kinyua family for about six weeks at their townhouse in the Baltimore suburb of Joppatowne.

The remains have been positively identified as Agyei-Kodie's and a relative in the United States has been notified, according to sheriff's office spokeswoman Monica Worrell. No other charges have been filed against anyone else, she said.

Both the victim and his alleged killer had attended nearby Morgan State University, a historically black university in Baltimore. Kinyua had just finished his junior year, and Agyei-Kodie was a graduate student who last attended classes in 2008. Both men were also originally from Africa; Kinyua, a U.S. citizen, moved from Kenya as a child and Agyei-Kodie was from Ghana.

Investigators haven't given a possible motive in the slaying. In a separate case on May 19, police said Kinyua beat a man with a baseball bat on Morgan State's campus, fracturing his skull and making him lose sight in one eye. Kinyua was free on $220,000 bail in that case. He is now being held without bond on a murder charge.

Kinyua, an electrical engineering student, had a very good GPA and had enough credits to be a senior in the fall, according to university spokesman Clinton Coleman. He could not comment on the May incident, but noted the university has a zero-tolerance policy toward violence and a student in such a situation would likely be suspended or expelled.

No students or faculty had approached the school with concerns about Kinyua, Coleman said.

In February, Kinyua posted a question on Facebook, asking fellow students at historically black colleges and universities if they were "strong enough to endure ritual HBCU mass human sacrifices around the country and still be able to function as human beings?"

He referred to the tragic shootings at Virginia Tech and "other past university killings around the country" and warned "ethnic cleansing is the policy, strategy and tactics that will affect you, directly or indirectly in the coming months."

Kinyua wrote on his page that he attended Morgan State and was a member of an ROTC-affiliated military honor society at the university, the National Society of Pershing Rifles. ROTC is a college-based U.S. military program that allows students to be commissioned as officers when they graduate. The page was linked to an Internet radio show called Warrior Syndicate Radio, which displayed a photo of Kinyua in green-and-white face paint.