A law enforcement official said the FBI is looking at a Web page on an adult-dating site, Adult Friend Finder, in which someone who looks like James Holmes — with hair dyed bright orange — opened an account, calling himself “classicjimbo.” That page has since been taken down.

Authorities have yet to verify a connection to the suspect in the Aurora, Colo., massacre. Police have warned the news media to be wary of social media sites that may be fraudulent.

The site is used by people to meet potential sex partners. The classicjimbo account appears to have been created recently.

Posted at the top of the page was a question: “Will you visit me in prison?” If authentic, it would be the closest thing yet to a signal from Holmes that he was planning a crime.

A 24-year-old woman from Fort Collins, Colo., said she accepted a friend request from classicjimbo recently but did not meet him or, to her knowledge, have any direct interaction with him.

“Nothing happened between us, but just knowing that a guy who would do something like that was interested in me — it’s just creepy,” she said in a phone interview. On her Adult Friend Finder page, she posted this message: “Please do not take it personally if I am hesitant to talk to anyone. I just found out that someone I friended on this site shot 71 people.”