Andrew Quinn, 22, a Cornell graduate who worked at Tishman Hotel & Realty, was killed Saturday.
Julio Acevedo, 44, was allegedly behind the wheel in the crash that killed a Williamsburg couple.
The 33-year-old victim was shot several times at 125 Taylor St. early Monday.
Police returned to the West Broadway storefront where Etan Patz's confessed killer once worked.
The motorcyclist was struck at Marcus Garvey Boulevard and Myrtle Avenue in Bedford-Stuyvesant.
The man was taken to Bellevue Hospital with non-life-threatening injuries, the FDNY said.
The stabbing occurred about 2:30 p.m. in Union Square on Monday.
The victim was hurt when a motorcycle and a car collided on the FDR Drive Tuesday.
Get Our Daily New York Newsletter
Thank you for signing up!
Would you like to sign up for additional newsletters?
Thank you for signing up for additional newsletters.