A nephew of a woman who was slain this month outside a Waverly bank was arrested yesterday and charged with setting up the killing by leaking her banking schedule to a violent gang member, city police said.

Danny Paul McGee, 39, who lives in the first block of Slavin Court in Parkville was fired from the family janitorial business two days before the slaying, police and family members said. Detectives said he was not at the shooting scene.

Police said they charged Mr. McGee with first-degree murder because he allegedly gave the killer "essential" information about his aunt's weekly trips to her neighborhood bank, several blocks from Memorial Stadium.

Local authorities, assisted by federal agents, were searching last night for an alleged accomplice. A warrant for first-degree murder was issued for Andre Edwin Allen, 34, of the 3400 block of Wabash Ave.

Investigators believe that the attacker only wanted to rob Pearl Elizabeth Moffett, 72, of the $1,500 she had withdrawn from the Nations Bank branch on Greenmount Avenue the afternoon of June 9. But the victim struggled with the gunman and the robbery "escalated into a homicide," a police spokesman said.

"We believe Mr. McGee conspired with Mr. Allen in making available dates, times and locations where Mrs. Moffett conducted her business," said Agent Robert W. Weinhold Jr., a city police spokesman. "The terms of the alleged conspiracy are unknown at this time, but what we do know is that Mr. McGee provided Mr. Allen with the essential details."

With the arrest in the Moffett case, police said, they also have broken up a "ruthless" gang believed to be responsible for up to 20 recent armed robberies in the city, including the abduction Sunday of a North Baltimore family.