He told police that Weaver and Davis got out of the car and were gone for about 15 minutes, according to charging documents. When they returned to the vehicle, Weaver said, "It's done," according to the court documents.
"That's it. That was enough," Mead said of the evidence that police used to charge her client.
But the cases against Weaver and Davis quickly began to unravel, Mead said.
First, Davis had "a very clear alibi as to where he was that night," the defense attorney said. "So it was clear that the statement of [the witness] has some inaccuracies. ... If you lied about one little part, you lied about other stuff, too."
In addition, she said, her own client also was not in the Woodlawn neighborhood at the time of the shooting. Rather, Weaver and some friends drove to the Inner Harbor that night to pick up another friend from work. The friend's manager, she said, saw the teenagers waiting outside for 45 minutes before the friend got off work at midnight.
The shooting, according to police, happened at 11:37 p.m. in the Heraldry Square neighborhood of Woodlawn.
"He was not out there," Mead said. "He knew nothing about it."
Then, the witness began changing his story, she said, and others who were in Heraldry Square on the night of the shooting told police that they had not seen the witness there.
"He was trying to get a deal," Mead said of the witness' own criminal charges. "He admitted that he lied about all of it. He started admitting that everything he had said piecemeal before was a lie. And it was. That time, he was telling the truth."
John Cox, the assistant state's attorney who handled the case, said there was not much he could say about the dismissal of the charges.
"I have to be very circumspect about that one," he said. "Some information had developed to the point that we decided we just didn't have the ability to go forward."
Weaver - an Eagle Scout, an acolyte at his church and a graduate of Baltimore's Mount St. Joseph High School who had also attended the Gilman School - is the son of Dr. Jesse R. Weaver, a dentist, and Alice G. Pinderhughes, an attorney. Neither returned phone messages yesterday.
Mead said that Nicholas Weaver could not comment on the case.
Brenda Baskin waited a long time for good news in the investigation of her son's death.
When she found Baltimore County police Sgt. Allen Meyer, the lead detective in her son's murder case, waiting at work for her on Feb. 15 at the Baltimore City Department of Social Services, she was overjoyed.