Most of the time bigfoot research is nothing more than hobbyists on camping trips armed with recording devices. Not much investigating actually takes place. Every now and then however, there's a glimmer of hope. One of the greatest bigfoot investigations to ever take place was the Sierra sasquatch footage investigation.
This is the full investigation of the Bart Cutino thermal footage in 2012. During the encounter Bart filmed multiple Sasquatch individuals observing the camp at the alleged Sierra Bigfoot kill site. There was a subsequent investigation of the footage done by ranger Robert Leiterman. This is that investigation.