Florida man, 55, who shot dead two FBI agents in child pornography raid was 'bipolar and unstable' and 'once pulled a gun on a pest exterminator at his apartment complex'
David Lee Huber, 55, shot dead Special Agent Daniel Alfin, 36, and Special Agent Laura Schwartzenberger, 43, on Tuesday in Sunrise, Florida
The shootings occurred as the agents tried to execute a search warrant as part of a child pornography investigation; Huber then shot and killed himself
He was suspected of exchanging pornographic images of underage children engaging in sex acts
Huber, who was a father-of-two, divorced his wife in 2016 and ran a computer consulting business