An image of Paul Wilson released in early 2020 by law enforcement officials.

As the anniversary of the Jan. 2, 2019, murder of Paul Wilson approaches, police say “some progress has been made” but no suspect in the killing has been identified.

The public’s continued help is asked in finding the killer, Middlesex District Attorney Marian Ryan and acting Cambridge police commissioner Christine Elow said in a Wednesday email.

Over the past three years, officials have continued to investigate, including conducting forensic testing, investigating similar incidents that have occurred in Cambridge and other communities and following up with people who came forward after the attack, Ryan and Elow said.

On Jan. 2, 2019, Wilson returned from work at IBM to the Porter Square T station and rode a Blue Bike home, parking it by his house on Sherman Street before walking through the park, investigators said. Wilson was found by a passerby shortly before 6:48 p.m. on an asphalt path near the Danehy Park parking lot and dumpsters, near New Street. He was taken to Beth Israel Deaconess Hospital and pronounced dead from blunt force trauma at around 10:18 p.m.

Wilson was approximately 6-foot-6 and was found in a location visible from the parking lot wearing shorts, a red winter coat, a winter hat and gloves, police said.

The family of Paul Wilson is offering a reward of up to $10,000 for information leading to the arrest and indictment of the person or persons responsible for Paul’s death.

Anyone with information about this case can contact Massachusetts State Police assigned to the Middlesex District Attorney’s Office at (781) 897-6600, Cambridge police at (617) 349-3121 directly or through a third party.