daniel boykin plead guilty to charges of unlawful photography , aggravated burglary , wiretapping and unlawful telephone recording .
he became obsessed with a female colleague .
she discovered he was stalking her after finding photos on boykin 's phone .
he had 92 videos of the victim - 29 taken from the bathroom at nashville international airport - and 1,527 photos .
also broke into her home five times and took photos of her clothes .
told the court thursday he was ` truly sorry '
sentenced to six months prison followed by five years probation .