London police are hoping to track down a witness to the city's second homicide of 2016.

Dakoda Martin, 21, was stabbed to death in Victoria Park around 3:00 a.m. on May 28.

Police say the person in question was not involved in the murder but helped the victim afterward.

A man was wearing gloves while giving first aid to Martin.

He spoke to police and paramedics shortly after the incident but was not formally interviewed.

A 32-year-old man is charged in his death.

Police say the victim and the accused were known to each other.

Contact police at 519-661-5670 if you have any information.