( CNN ) -- A cryptic confession on the popular PostSecret blog had Chicago police searching a city park over the weekend for a possible homicide victim . The anonymous message appeared as one of the Sunday Secrets posted weekly on the PostSecret blog . Followers of the blog mail postcards illustrating their anonymous secrets to website founder Frank Warren . Each Sunday , Warren scans a selection from the thousands mailed to him and uploads them to the blog . The postcard in question appeared as the top image Sunday and showed what appeared to be an aerial map of a park . A Post-It style note attached to the image read , `` I said she dumped me , but really I dumped her ( body ) , '' with a red arrow pointing to a particular spot . Eagle-eyed users of the website Reddit helped identify the exact location on the postcard as Chicago 's Jackson Park , and the post quickly spread across social media . It also caught the attention of the Chicago Police . Opinion : How the world shares its secrets . `` We basically had a cryptic message observed on the site pertaining to a possible criminal act , '' Officer John Mirabelli told CNN Monday . `` Officers immediately went to the park and conducted a search . There was no evidence of a crime or anything that was unusual . '' Police detectives will continue to investigate , `` but nothing has surfaced to indicate that a crime was committed , '' Mirabelli said . Reaction to the posting varied . On its Twitter page , PostSecret retweeted comments , including one from Paige Bernard , who wrote , `` thank you for posting that really chilling confession . Even the scariest secrets need to be heard . '' Another user expressed outrage : `` posting that photo and map of a where a dead woman 's body may lay , is exploitative and wrong . What is wrong with you ! ? ! '' Why people share murder , rape on Facebook . While it appears the postcard was a hoax , authorities are not finished with their investigation . `` If the intent behind the message was to cause alarm and cause the police to search that location , then it is a crime -- like screaming fire in a crowded theater , '' Mirabelli said . `` But it depends on the offender -- are we dealing with a child or an adult ? A whole lot of factors to consider . '' The postcard implying that a killing may have been committed remained at the top of the website Monday . Warren did not return a CNN request Monday for comment . Warren started PostSecret as an art installation in 2004 , handing out self-addressed postcards inviting people to share their secrets with him anonymously . The idea went viral , with Warren receiving more than a half-million postcards in nearly 10 years -- all sent to his Germantown , Maryland , home . Secrets range from the funny ( `` I walk across campus so I can poop in the dorm with the nice bathrooms , '' one secret posted Sunday reads ) to the downright eerie ( `` Everyone who knew me before 9/11 believes I 'm dead , '' is one Warren shares regularly when he gives talks on the website on college campuses ) . Florida man allegedly kills wife , posts confession , photo of body on Facebook .
Secret posted on popular blog suggests writer killed a woman . Social media users help identify the site as a Chicago park . Score: 7