Residents in the complex said Tuesday night they had not heard anything and did not know the victim. Jack Maguire, 64, looked out his second-floor window toward the parking lot. He had returned home from grocery shopping to find several police cars with their lights flashing in the lot.

"We're better off locking the doors now," Maguire said. "We never had this kind of trouble here. We've been here for 32 years, and I've never seen anything like this."

In Long Reach, where McNair was killed, one resident said she heard a pop and then someone screaming. Another resident, who said she has been living in the complex for less than a year, said the neighborhood was "pretty quiet" until Monday night.

"I'd like to know if it's some kind of isolated incident," Kim Toddman, 44, said.

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Police investigating the shooting searched Tuesday for evidence outside of Howard High School but did not find anything, according to school Principal Gina Massella.

"We've been following up on tips and leads, and we've increased patrols in that specific neighborhood and have been conducting some searches today for evidence," Llewellyn said Tuesday. "Those are all typical things after we have a homicide like this."

In the other two killings in the county this year, a 17-year-old boy was stabbed to death in July at his home in the 8700 block of Airybrink Lane, which is also in Long Reach and about a half-mile from where Monday's shooting occurred. An 18-year-old Columbia man was arrested and is facing trial.

The same week, the April death of a 3-year-old Oakland Mills boy was ruled a homicide after an autopsy by the Maryland Medical Examiner's Office determined he had been asphyxiated. No arrests have been made in that case.

There were five homicides in Howard County in 2010.

For updates on the slayings, go to