Police working to identify man seen on surveillance video knocking on door in LaSalle

LASALLE COUNTY, Ill. (WLS) -- Police are trying to identify a man seen on surveillance video knocking on the door of a home in LaSalle.

Relatives of Jelani Day say they've seen it and it's not him.

The video shows a man knocking on the door of the home. When no one answers, he walks away.

"A Peru Police Detective received information from a surveillance video in La Salle Illinois of a male black knocking on a door. The owner of the property does not know who it is and sent it to the police department. We are trying to identify the male black to question him as to the reason why he was at the residence. The video was shown to Mr. Day's family who stated it was not him. The Peru Police Department is following up on any and all leads. Until this subject is identified and question it is unknown if it has anything to do with Mr. Days case," said Bob Pyszka, Chief of Police at Peru Police Department.

Day is the Illinois State University graduate student who was last seen on August 24. Police say this video was recorded the next day.

RELATED: Jelani Day's family looking for answers after missing ISU student found dead in river

Day's body was found earlier this month in the Illinois River. It was positively identified on Thursday.

His family said they are upset it took police so long to share the video.