Hillsborough, N.C. ? A man charged with murdering the University of North Carolina student body president was arrested Wednesday as detectives hunted for a second suspect.

Police would not say which suspect they believe shot and killed Eve Carson, 22, of Athens, Ga., who was found a week ago lying on a street about a mile from campus. The biology and political science major had been shot several times, including once in the right temple.

In the days after Carson’s death, police focused their investigation on several ATM and convenience store surveillance photos.

The school’s Board of Trustees offered a $25,000 reward for information leading to an arrest, and police received hundreds of tips after the first two photos were released over the weekend.

Demario James Atwater, 21, was arrested early Wednesday as he left a home in Durham that police had placed under surveillance after receiving a tip. Atwater was ordered held without bond on a charge of first-degree murder. His next court date was set for March 24.

Police said they are still searching for the second suspect, 17-year-old Lawrence Alvin Lovette Jr., who was thought to be armed and dangerous.

Police believe Lovette, who also was charged with murder, was pictured in two photos taken at an ATM, driving Carson’s Toyota Highlander with Atwater in the back seat. Police also believe Atwater was the suspect shown trying to use Carson’s ATM card inside a convenience store.

Carson was a prestigious Morehead-Cain scholar at North Carolina, where she was remembered by thousands who gathered last Thursday at two memorial services. Hundreds of mourners also filled the First United Methodist Church in Athens on Sunday at a memorial service.

The university said Wednesday that a third memorial service will be held next week at the Smith Center, the school’s basketball arena.