(CNN) -- The teen suspect in last week's slaying of University of North Carolina student Eve Carson has been charged in a second student killing, police said Thursday.
Lawrence Alvin Lovette Jr. surrendered without incident after a four-hour standoff, police said.
Lawrence Alvin Lovette Jr., 17, was arrested Thursday morning in connection with Carson's death.
Lovette also has been charged in connection with the January death of Duke University graduate student Abhijit Mahato, 29, a doctoral engineering candidate from India, according to a news release from the Durham, North Carolina, police.
Lovette is the second person charged in Mahato's killing, police said.
Mahato was found shot to death at a Durham home on January 18. Five days later, police arrested Stephen Oats, 19.
Lovette also was the second person arrested in connection with Carson's death.
Heavily armed officers surrounded a house in Durham shortly after midnight Thursday following an anonymous tip that Lovette was inside, police said.
Lovette surrendered without incident after four hours, Durham police Lt. Robert McLaughlin Jr. said.
Police arrested the other Carson suspect, Demario James Atwater, 21, at a Durham residence on Wednesday. Authorities were watching the home after receiving a tip that Atwater was there. Both Atwater and Lovette are charged with murder in Carson's death.
Carson, 22, was found shot to death in the early hours of March 5 in a suburban neighborhood near the UNC at Chapel Hill campus. Her car was found the next day in another neighborhood, close to where she lived with roommates.
Police released surveillance-camera photos from an ATM last week. The photos showed a young man wearing a hooded sweat shirt and baseball cap possibly using one of Carson's ATM cards, police said. In the pictures, a second person appeared to be in the back seat of the car, which may have been Carson's sport utility vehicle, according to police.
Chapel Hill police Chief Brian Curran told reporters that authorities suspect Lovette was driving the car in the ATM photos and Atwater was in the back seat.
Curran would not comment on whether physical evidence links the two to the crime.
Atwater was taken to a hospital as part of the evidence collection process, he said, and brought back to make an initial court appearance.
The UNC-Chapel Hill Board of Trustees has pledged $25,000 to the Crime Stoppers program in the area for information leading to the arrest of anyone responsible in Carson's death.
The young woman was a pre-medicine student with a double major in political science and biology, and was a recipient of the university's prestigious Morehead Scholarship and a member of the Phi Beta Kappa honor society, according to UNC.
"As encouraging as the developments today are, we are still a community in grief," Chapel Hill Mayor Kevin Foy said at a news conference Wednesday announcing the first arrest. "We also still must offer comfort to a family in mourning, Eve's family."
James Moeser, chancellor at UNC-Chapel Hill, issued a statement Wednesday saying the university is grateful for police efforts in the case. "Our interests are in seeing justice served and helping our community during this difficult time," he said.
A memorial service in Carson's honor will be held Tuesday at the Dean E. Smith Center on the UNC campus. E-mail to a friend