STATEN ISLAND, N.Y. -- Talk about brazen. After robbing a senior couple at gunpoint in their Oakwood home early Wednesday morning, a Port Richmond teen asked the victims to give him the phone number of a cab company so he could make his getaway, said a law enforcement source.

But the plan backfired when the victims alerted cops, who found out where the cab was headed and were waiting to arrest Ronald Baker, 19, when he was dropped off a short distance from his Walker Street home.

The incident occurred about 1:30 a.m. on the 1900 block of South Railroad Avenue, said court papers.

The source said Baker, along with a female accomplice, knocked on the victims' door. The couple, an 85-year-old man and his 71-year-old wife, live with their 46-year-old daughter, the source said.

According to the source, Baker, who's also known as Rodney Harvest, knew the younger woman's late son. The son apparently told Baker that his grandparents kept valuables in the house, the source said.

Baker and his unidentified accomplice pushed their way inside when one of the residents answered the door, said the source.

Brandishing a gun, Baker forced the couple to the ground, the source said. He allegedly repeated those actions when the couple's daughter came downstairs.

The suspects rifled through the house, swiping four watches, jewelry, a knife and an undisclosed amount of cash, whose collective value exceeded $15,000, said authorities.

Before leaving, the suspects got the name of a cab company from the victims and called for a car pick them up, said the source.

They forced the victims into a closet and secured it with a chair, then exited, the source said.

The victims managed to free themselves and called police. Cops contacted the cab company and determined Baker's destination, a street near the Bayonne Bridge.

On exiting the cab, Baker saw cops waiting for him and bolted, said the source.

Officers quickly tracked him down on Morningstar Road near the Dr. Martin Luther King Jr. Expressway.

Baker's accomplice remains at large, court papers said.

Baker was charged with multiple felony counts of burglary and robbery, said a spokesman for District Attorney Daniel Donovan.