No one answered at a home in the 15000 block of Oak View Trail in Fort Bend County mid-morning Thursday.
Neighbors said early in the morning they heard a big boom when the front door was knocked open as investigators served a search warrant and arrested three people.
"I thought it was an explosion," said one neighbor. "He was a quiet neighbor. Didn't cause any problems. The motorcycles. We would hear a lot of noise with that. Other than that, I don't think any of the neighbors were surprised."
The US Postal Inspector said the search warrant was aimed at a major online distributor of synthetic drugs. The spokesperson says contraband was seized during the search.
Another source told Local 2 that money orders were also seized.
Investigators from the US Postal Inspector, the Drug Enforcement Administration and the Missouri City Police seized three motorcycles plus a Bentley, a Mercedes and a Cadillac Escalade.
Investigators say this is an ongoing investigation and others could face charges. They said charges in this case could include first degree felonies.