NEW YORK (CBSNewYork) — The NYPD and ATF are offering a reward of up to $40,000 for information that leads to an arrest and conviction in the still unsolved 2016 explosion that severely injured a tourist in Central Park.

Connor Golden, of Virginia, lost part of his left leg in the July 3 blast.

The 19-year-old college student stepped on an explosive device after jumping off a rock formation near the park entrance on Fifth Avenue and 60th Street.

Since then, his family has battled their health insurance provider over the cost of Golden’s prosthetic leg.

Police said the device contained traces of common substances that can be found at local hardware stores and appeared to be the work of a hobbyist.

“Right now, we’re still missing a lot of answers. We need a lot of information, so we’re reaching out to the public,” NYPD Chief of Detectives Bob Boyce said.

Boyce said initially there were about 20 leads, but none led to a suspect.

In addition to tips, investigators are also asking the public for photos and video that they may have taken near the scene in the hours and days before the incident.

“The NYPD continues to use every investigative tool to find who may have placed this explosive material in Central Park,” said NYPD Commissioner James P. O’Neill. “Someone, somewhere, knows something about this explosion that left a young man severely injured. We want to talk to them. No detail is too small.”

“We want our parks and public spaces to be safe for everyone and we want justice for the victim,” said ATF Special Agent in Charge Ashan M. Benedict.

Anyone with information in regards to this incident is asked to call the NYPD’s Crime Stoppers Hotline at 1-800-577-TIPS (8477) or for Spanish, 1-888-57-PISTA (74782).

The public can also submit their tips by logging onto the Crime Stoppers website or by texting their tips to 274637 (CRIMES) then enter TIP577.

The public may submit tips to the ATF at 1-888-ATF-TIPS (283-8477) or by email at

All tips will be kept confidential.

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