Buela M Sam used a fake ID card to check into the guest house on Sept 20. According to Bangalore Police Commissioner Jyothi Prakash Mirji, Buela remained in the guesthouse on Sept 21 and went to Antariksh Bhavan the next day.
Her husband Alex Thomas who teaches at a high school in Ahmedabad said that Buela often disappeared from their home.
"Alex claimed Buela has been under treatment for depression for 18 months. We're yet to ascertain her medical history," Mirji told reporters.
Buela reportedly attended the funeral of her father at Punalur in Kerala on Sept 11. She then proceeded to Mangalore and had the fake ID made at a photo studio. After this, she came here.
Security persons at Antariksh Bhavan grew suspicious when they saw Buela wandering aimlessly through the ISRO headquarters on Sept 22. She asked them about a conference that was not even scheduled.
On checking her ID, the security persons realised that it was a fake one. "They asked her to return to the guest house and alerted Central Industrial Security Force personnel," Mirji said.
At the guest house, Inspector Lakwant Singh of the CISF again scanned Buela's ID and subsequently alerted the police. They took her into custody on Sept 23 and registered cases under IPC sections relating to impersonation, cheating, forgery and trespass among others.
Police are now trying to find out why Buela had entered Antariksh Bhavan. "The ID card was in her name and mentioned her designation as a senior scientist. We'll soon find out what made her produce a fake ID," Mirji added.