SAN ANTONIO -

Police are sending a message out to the public that San Antonio parks are safe after some recent allegations about a sex assault at a park on the city's Northwest Side.

On Wednesday, San Antonio Police Chief William McManus said the allegation about an attack that took place on Jan. 17 on the trails at the Leon Creek Greenway never happened and the woman just made it up.

The woman told police that she was sexually assaulted by a man wearing a ski mask and with a spider tattoo.

However, McManus said the description of the suspect kept changing and that based on the information given, investigators knew that the woman made up the story.

McManus said they are not sure why exactly she did it, but they say it may have something to do with her relationship with a significant other.

He said the investigation into the incident took from the department's time and resources.

"What's frustrating and what's concerning is the fact that the city was alarmed after this happened, in the the wake of Lauren Bump's murder," said McManus. "This simply didn't happen. Crime is actually down in the parks -- way down -- and it's just unfortunate that the city and people who use these parks to go and relax and exercise had to have that concern."

Police said they are not going to file charges against the woman because they wanted her to come forward with the truth and they didn't want her to be reluctant about it for fear of being charged.

For a list of recent stories Stephanie Serna has done, click here.