Chicago (CNN) A Northwestern professor and an Oxford University employee were arrested Friday after a national manhunt following the stabbing death of a Chicago cosmetologist. 
 
 Wyndham Lathem turned himself in Friday evening in Oakland, California, after authorities made contact with him, while Andrew Warren surrendered to police in San Francisco, according to the US Marshals. 
 
 The suspects in the death of Trenton Cornell-Duranleau are now awaiting extradition to Illinois. 
 
 Cornell-Duranleau, 26, was found dead from multiple stab wounds in Lathem's Chicago apartment on July 27. 
 
 Lathem, 42, is an associate professor of microbiology and immunology at Northwestern and Warren, 56, works for Oxford University in England. 
 
 Prior to the arrests, Lathem had sent a video to his friends and family in which he talks about the biggest mistake of his life, a high-level source at the Chicago Police Department told CNN on Friday. 
 
 CNN has not seen the video and police are not releasing it, but Chicago Police spokesman Anthony Guglielmi characterized it as Professor Wyndham Lathem "apologizing for his involvement in the murder of Trenton Cornell-(Duranleau)." 
 
 His death occurred the same day that one of the suspects walked into the public library of Lake Geneva, a Wisconsin resort city about an hour's drive from Chicago, and made a $1,000 cash donation in Cornell-Duranleau's name. 
 
 Victim was 'mutilated,' source says 
 
 On Wednesday, Chicago police issued first-degree murder arrest warrants for Lathem and Warren. 
 
 Chicago police were tight-lipped about many details. They said they could not elaborate on any possible relationship between the victim and the two suspects. 
 
 A high-ranking police official on Thursday told CNN that responding officers found a horrific scene in Lathem's River North apartment. 
 
 "The victim was savagely murdered," the official said. Frankly, he was "mutilated." 
 
 Police recovered what they believed to be a murder weapon -- a broken blade. 
 
 The Cook County medical examiner's office said the autopsy is not complete. 
 
 According to CNN affiliate WLS , investigators determined that Warren had recently come to Chicago from England but didn't know whether he knew the victim. 
 
 Wanted for Murder by CPD - Our search will only intensify. Prof Latham & Mr Warren, do the right thing & turn yourself in to any police dept pic.twitter.com/fwWkcfFfco — Anthony Guglielmi (@AJGuglielmi) August 2, 2017 
 
 Police had said they believed the two suspects have fled the state. 
 
 "We do have an idea of their whereabouts and efforts to locate them are only intensifying from here on in," police said in an email to CNN. "Our primary focus is to facilitate a safe surrender." 
 
 Federal agencies, including US marshals, assisted in the search. Lathem's passport and Warren's travel visa were restricted. 
 
 'This place is very safe' 
 
 The apartment is in an upscale high-rise called the Grand Plaza Apartments. 
 
 "There's shock, there's no doubt about it. You know, this place is very safe," Grand Plaza resident Richard Aili told WLS . "I've been here 14 years and I've never heard of problems such as that." 
 
 Northwestern said in a statement that Lathem "has been placed on administrative leave and banned from entering the Northwestern University campuses." 
 
 "This is now a criminal matter under investigation by the appropriate authorities, and Northwestern University is cooperating in that investigation," according to the statement. 
 
 Lathem joined the Northwestern faculty in 2007 and researched bacteria that cause disease in humans, particularly lung infections, according to his university biography page, which has since been removed. 
 
 He spoke at conferences and has appeared in videos about disease research. One posted earlier this year details how an organism contributed to pneumonic plague 
 
 Victim remembered as friendly, a 'character' 
 
 A hairstylist fondly recalled Cornell-Duranleau. 
 
 "He was a nice kid who got along with everyone. People loved him. He was friendly," Peggy Bosel told CNN. 
 
 Bosel has been a hairstylist at Timber's Salon in Trenton, Michigan, for 19 years and said Cornell-Duranleau worked there for around a year and a half. 
 
 "He loved people and was really trying to get into the hair business, but that wasn't working out too well. It's a hard business," Bosel said. 
 
 She said Cornell-Duranleau was a "character" and had a good sense of humor. 
 
 The stylist said she and colleagues had never heard of the suspects. 
 
 Cornell-Duranleau left the Michigan salon at least a couple years ago, Bosel said. "He wanted to expand himself and get more experience in the business." ||||| An associate professor at Northwestern University and an Oxford University employee wanted in connection with a murder in Chicago surrendered separately to authorities in California on Friday, ending a nationwide manhunt, a U.S. Marshals official said. 
 
 Associate professor Wyndham Lathem surrendered to marshals at the Oakland federal building at around 7:30 p.m. local time (10:30 p.m. ET) and Andrew Warren surrendered at a police station in San Francisco, U.S. Marshals Supervisory Deputy Frank Conroy said. 
 
 Warrants for first-degree murder had been issued for both men Monday for their alleged involvement in the death of Trenton H. James Cornell-Duranleau, who was found stabbed to death in a luxury Chicago apartment on July 27. 
 
 "Wyndham surrendered peacefully and we didn't have any issues with him," Conroy said in a phone interview. "It was a long nationwide manhunt, a very important case, especially for the city of Chicago, and we are hopeful this arrest brings closure to the victim's family." 
 
 Wyndham Lathem, lefrt, and Andrew Warren Chicago Police Department via AP 
 
 Chicago police spokesman Anthony Guglielmi said detectives will interrogate Lathem and Warran once they are returned and police will publicly detail the cases against them after those interrogations. 
 
 "Both individuals will be held accountable for their actions," Guglielmi said in an email. Police said they will outline their case against the two suspects after the interrogations take place. 
 
 Lathem, 42, is an associate professor of microbiology and immunology at Northwestern University and has been a faculty member in the department since 2007. Warren, 56, is a senior treasury assistant at Oxford University. Lathem and Warren will appear in Alameda and San Francisco county courts and will have extradition hearings, Conroy said. 
 
 Alan K. Cubbage, vice president for media relations for Northwestern University, said Saturday that Lathem "was in the medical school so he taught medical students or graduate students sometimes but he was primarily a researcher." Cubbage said Lathem never taught undergraduate students, was not teaching at the time and he was not scheduled to teach in the fall. 
 
 Guglielmi has said that police got a call the Grand Plaza building manager who had received a cryptic tip that something had occurred in apartment 1008, and police found Cornell-Duranleau dead. 
 
 Guglielmi said Lathem and Warren were confirmed to be at the building by security cameras. Lathem lived in the apartment that was identified as the crime scene, he said. 
 
 On Friday Chicago police said Lathem had sent a video message to various friends and family members apologizing for his involvement in the killing. Police also said the two suspects made a $1,000 donation to a Wisconsin library in Cornell-Duranleau's name, police said. ||||| This undated photo released by the Chicago Police Department shows Wyndham Lathem, an associate professor of microbiology and immunology at Northwestern University. An arrest warrant was issued Monday,... (Associated Press) 
 
 CHICAGO (AP) — Police are searching for a Northwestern University professor and a University of Oxford employee suspected in the stabbing death of a Chicago man and have alerted law enforcement agencies around the country that the pair should be considered armed and dangerous. 
 
 Anthony Guglielmi, a Chicago police spokesman, said Wednesday that a Cook County judge issued first-degree murder warrants for Wyndham Lathem, 42, and Andrew Warren, 56, in the killing of Trenton Cornell-Duranleau. Cornell-Duranleau, 26, was stabbed to death last week in a 10th floor apartment believed to be Latham's in the River North neighborhood. 
 
 Police have not released a possible motive or said how they linked the suspects to the killing, but Guglielmi said security camera footage shows them leaving the building that night. 
 
 Guglielmi said Lathem and Cornell-Duranleau knew each other, but he didn't know any details about the relationship. He said investigators determined that Warren, who lives in England, came to the U.S. recently for the first time, but he didn't know if Warren knew the victim. 
 
 Officers went to the apartment last Thursday night after the person working at the building's front desk called to report that he'd received an anonymous call about a crime having been committed in that unit. Cornell-Duranleau, who lived in the Heart of Chicago neighborhood on the city's lower West Side, was pronounced dead at the scene. The medical examiner's office said he died of multiple sharp force injuries. 
 
 A Northwestern University spokesman, Alan Cubbage, said in a news release that the school is cooperating with the investigation and that Lathem has been placed on administrative leave and banned from entering school property. He said there is no indication that Lathem, an associate professor of microbiology-immunology who has been on the faculty since 2007, is a danger to anyone at the school. 
 
 Warren is a senior treasury assistant at Somerville College in England, which is part of the Oxford University network, according to a university website. 
 
 According to an obituary posted by Cornell-Duranleau's family on the website of The Argus-Press of Owosso, Michigan, Cornell-Duranleau had a cosmetology license. The obituary doesn't say when Cornell-Duranleau came to Chicago, and the family didn't reply to calls seeking comment.
– A manhunt for two university employees wanted in the murder of a Chicago hairstylist ended Friday in California. Wyndham Lathem, 42, a bubonic plague expert who has been an associate professor at Northwestern University since 2007, turned himself in "peacefully" to police in Oakland on Friday evening, NBC News reports. Andrew Warren, 56, a treasury assistant at Oxford University in Britain, surrendered to cops in San Francisco in connection with the death of Trenton Cornell-Duranleau, 26, who was found dead in Lathem's apartment on July 27. The victim died of multiple stab wounds, police said. The men are awaiting extradition to Illinois on first-degree murder charges, CNN reports. On Friday, Chicago police said Lathem sent family and friends a video message apologizing for "his involvement" in the brutal slaying, calling it "the biggest mistake" of his life, per the Chicago Tribune. Police have not released a motive or many details about the murder, but a high-ranking police source tells CNN the "victim was savagely ... mutilated" in Lathem's upscale apartment. Police recovered a broken blade believed to be the murder weapon. They said it was unclear if Warren knew the victim; the Brit was just three days into his first trip to the US when the murder occurred. An odd twist: On the day of the killing, one of the suspects walked into the public library in Lake Geneva, a Wisconsin resort town about 90 minutes northwest of Chicago, and made a $1,000 cash donation in Cornell-Duranleau's name, the Tribune reports.