Elk Grove Police say they have identified a "person of interest" in the stabbing death of a 75-year-old man who was killed while he was collecting recyclables on a trail.

Police identified the victim as Xihao Huang, an Elk Grove resident.

His body was found yesterday on a trail near Whitelock Parkway and Bellaterra Drive. He had been stabbed several times.

During the investigation, officers identified a person of interest who was already in custody on an unrelated charge.

They are not releasing the person's identity.