Video of the suspect wanted for pushing an 87-year-old woman to the ground March 11. (Credit: NYPD)

NEW YORK (PIX11) — An 87-year-old woman who was shoved to the ground during a random attack on March 11 has since died, police said Tuesday.

(Credit: NYPD)

NYPD Chief James Essig asked for the public’s help solving the “disgusting, disgraceful offense committed against a vulnerable, elderly female who was doing nothing but walking down the streets of New York City.”

Barbara Maier Gustern, a singing coach who had worked with performers on Broadway and beyond, died after the unprovoked attack. Essig said the suspect, who is still at large, crossed the street, approached Gustern from behind and then shoved her, causing the head injury that led to her death.

The incident happened around 8:40 p.m. on March 11, according to the NYPD. Gustern suffered a cut to her head when she fell and was taken to a hospital, where she was listed in “serious” condition before her death.

Police released images and video of the suspect, who walked away after the unprovoked attack. No arrests have been made.

“I’m devastated to learn of the absolutely senseless death of Barbara Maier Gustern,” Sen. Brad Hoylman tweeted Tuesday. “Her assailant, who is still at large, must be apprehended and prosecuted to the fullest extent of the law.”

Submit tips to police by calling Crime Stoppers at 1-800-577-TIPS (8477), visiting crimestoppers.nypdonline.org, downloading the NYPD Crime Stoppers mobile app, or texting 274637 (CRIMES) then entering TIP577. Spanish-speaking callers are asked to dial 1-888-57-PISTA (74782).