A twice-convicted killer was held on high bail today at his arraignment on charges that he robbed a Boston cab company two months after he was paroled, Suffolk County District Attorney Daniel F. Conley said today.

In addition to the $1 million dollars’ cash bail set by Boston Municipal Court Judge Sally Kelly, GERALD HILL (D.O.B. 11/2/62) was also held on a parole detainer, meaning that he will remain behind bars even if he posts bail.

Hill is charged with armed robbery, assault and battery with a dangerous weapon, assault with a dangerous weapon, and a litany of firearms-related offenses, all incurred when he allegedly took part in the armed robbery of the Boston Cab Company dispatch center in the Fenway yesterday morning.

Assistant District Attorney Mark Hallal, chief of Conley’s Senior Trial Unit, told the court that Hill and an unidentified associate entered the cab company’s Kilmarnock Street office at about 9:50 yesterday morning after arriving in a white Honda Accord that had been stolen in Newton on Nov. 5.

The assailants brandished firearms, Hallal said, and told an employee not to move. One of the assailants struck the employee in the head with his gun and forced him into a back room where other employees were counting money.

While holding the employees at gunpoint, Hill and his confederate allegedly stuffed the money into bags and fled the scene. When they found their getaway car blocked by a truck, Hallal said, one of them pointed a gun at the driver and told him to move.

The men left the scene in the Honda and abandoned it near Boylston and Ipswich streets. A Boston Police officer working a paid detail nearby heard the radio call for an armed robbery responded to the area, saw a man matching the general description of one of the assailants get into a cab with two bags, and followed the vehicle with other officers.

The detail officer stopped the taxi on Charlesgate East and approached. He allegedly saw Hill move his arm toward his waistband. The officer notified his fellow officers that there was a gun in the vehicle. The officers raised their duty weapons and ordered Hill to drop his firearm, which Hill did.

The officers removed Hill from the taxi. From within, they recovered two bags full of cash, a pair of .38 caliber revolvers, and five zip ties.

Hallal told the court that Hill had previously been convicted of two homicides. Hill was found guilty of the Oct. 22, 1977, stabbing death of Leo Murphy in Boston’s South End as well as the Feb. 10, 1978, shooting death of Max Fishman in West Roxbury, which took place while Hill was free on bail in the earlier homicide.

He was paroled on Sept. 3 of this year. Suffolk prosecutors had repeatedly argued against his early release.

Conley said the investigation into the identity of Hill’s armed robbery accomplice remains very active and urged anyone with knowledge of the incident to contact Boston Police at 1-800-494-TIPS.

Hill is represented by attorney Greg St. Cyr. He will return to court on Dec. 4.