Where were the dogs?

I thought that all the unleashed dogs were supposed to make the city parks safe. This is from the news radio station WINS online news:

Police: Couple Robbed at Gunpoint in Central Park

NEW YORK (1010 WINS) -- A man and woman walking through Central Park were robbed at gunpoint early Saturday morning.

Police say the hooded suspect, wearing all black, approached the couple, both 25 years old, near the the Heckscher ball fields at W. 65th St. just before 5 a.m.

The perpetrator took cash, cell phones and possibly their iPods before running off.

There were no injuries.