Boston, Dec. 1—Cornelius Moriarty, known in Boston’s South End district, the police said, as “Conny, the Rat,” was booked at police headquarters shortly before midnight tonight on a warrant charging him with assault with a dangerous weapon on a police officer in performance of his duties, in connection with the shooting last Saturday night of Patrolmen Thomas K. McCabe and Joseph F. Condon. Both officers are still on the danger list in a hospital here as a result of bullet wounds received following a holdup in the Back Bay district.

Picked up in the police dragnet after several witnesses had said that pictures of him resembled the man who shot down the two officers and then forced a taxi driver at gun point to drive hint away. Moriarty tonight denied any connection with the crime.

“I didn’t shoot those cops,” he told the Inspector who arrested him, and a moment later said, the detective asserted, “If I’d known you were out to get me it would be you and I all over the street and it would be you going to the station house.”