That article is in reference to a tip the news outlet received.
This article is a statement LE gave of the timeline of what happened in the first week.
Gannon Stauch Missing: 5 Fast Facts You Need to Know | Heavy.com
“Lieutenant Mihalko said the sheriff’s office received a call about 6:55 p.m. Monday for a runaway child in the 6600 block of Mandan Drive. Police entered Gannon into missing persons databases about an hour later as an active runaway. Mihalko said deputies conducted an initial investigation that included interviews with the reporting person, identified as Gannon’s stepmom, and she told them he was last seen between 3 or 4 p.m. that day. The deputies also searched the area but did not find Gannon.
On Tuesday, Mihalko said the investigations division took over the case and began collecting information, including video surveillance, neighborhood canvass information and conducted interviews. They also followed up on additional leads and used various techniques and technology. He said the investigation continued through Wednesday and into Thursday, when it was upgraded from a runaway to an endangered missing child based upon the information that was gleaned from the investigation so far.”