UPDATE: Arrest made.
Yesterday's sexual attack and robbery happened in the Bradley Rosaceous Collection near the Forest Hills gate in the arboretum's northern end (Arboretum map), according to a memo sent to Arnold Arboretum staff today
The memo, now circulating on neighborhood mailing lists, says the victim had set up a blanket off Willow Path (which parallels the Arboway) , about 100 yards from the gate. Around 11 a.m., she was approached by a man with what appeared to be "a hunting-style" knife, who threatened her with "assault and death" and then took her purse.
Police described the attacker as a black male in his early twenties, 5â€™4â€ť to 5â€™6â€ť and thin. he wore a black do-rag, a white t-shirt and dark jeans with some gray. He rode a black bicycle.