They first take a tour of his facility and showed some of the venomous snakes he has and then later incident itself. They had Swat Teams and everything. They never named the gunmen only said it was Tom's partner and friend. Tom said they had a arguemnt and then he (the gunmen) pulled a gun and start wacing it around like an orchestra conductor and he (the gunmen) was looking right through him at something that wasn't there.
In the end Tom said it was the saddest day of his life. He didn't know why his friend did what he did.
I know this is old news for a lot of you but I was just surprised to see it on a TV show.
The venom 1 team was there in case any of the snakes got loose durinf the Swat raid.