Abe Liu, a 27-year-old student at Harvard Extension School, was escorted out of Weld Hall on Thursday by Harvard University Police Department officers after sleeping in friends’ rooms in the freshman dormitory and telling students that he was a freshman at the College.

Over a period of two months, Liu told Harvard students that he lived in Weld, a dorm in Harvard Yard. He sometimes spent the night there when invited by freshman acquaintances.

Liu also created a presence at Harvard online, posting frequently to the Harvard University Class of 2015 Facebook group and becoming friends on the social networking website with Harvard students he had never met in person. Pictures of Liu taken in freshman dorms and posted on Facebook added to his credibility, acquaintances said. Since Thursday, Liu’s account has become unsearchable and his posts to the Harvard freshman group are gone.

Though suspicions about Liu’s identity arose among freshmen primarily due to his lack of swipe access to Harvard buildings, it remains unclear who alerted HUPD.

“Although the man was invited into [the] building, he was not a College affiliate and College officials determined that he was no longer welcome,” HUPD spokesperson Steven G. Catalano wrote in an emailed statement.

Students said to have hosted Liu in their room and the proctor in the entryway that Liu frequented declined to comment for this story.

In the days following Liu’s removal from Weld, rumors and questions about his identity and intentions have circulated among students at the College, sparking debate and speculation over various email lists, on Facebook, through student-generated internet memes, and in an article published online by The Harvard Independent, a weekly student newspaper.

Liu said that his removal from Weld and the subsequent rumors resulted from lies he told in an attempt to gain friends that spiraled out of control.

Liu’s account of his path to Harvard is this: He spent some time in college in North Carolina. Then he dropped out of school to compete in triathlons, an activity he had enjoyed from an early age. When that dream did not pan out, he decided to enroll at the Harvard Extension School in the hope of eventually becoming a doctor.

Liu said that during the summer before matriculating at Harvard, he came across the Class of 2015 Facebook group. Out of curiousity, he joined. Once he was in the group, he began to interact with members of the freshman class. He said that he took to “trolling” the group as a hobby.

“I just played off like I was a student. It got addicting,” Liu said. “It got fun.”

Liu said he spent less time on Facebook when the fall arrived and he filled his time with a job and academic work. But after quitting his job in late September to focus on his medical studies, he found himself with spare time and decided to return to the Facebook group.

Liu said he was curious about the people he had met online and wanted to put a face to their “internet identities.” According to Liu, he told his first lies when he met those students in person.

“The first lie is like, ‘Oh, I’m a student at the College,’” he said. “They always want to know more, so you start telling a lot of little white lies. And then you find yourself integrated into that society.”

Liu said that when a freshman acquaintance asked him to spend time in Weld, he was reluctant, but he eventually decided to go ahead. Sometime during October, he began telling freshmen he lived there.