A Central Texas man has been convicted of conspiracy to possess with intent to distribute in excess of 50 kilograms of marijuana.

Phillip Larry Koss, 59, could face up to 20 years in prison. Sentencing is scheduled for April 1.

Koss was arrested in November 2013 when authorities found more than 230 pounds of high grade marijuana along with multiple weapons on a Waco property owned by Phillip’s son, Connor Koss. Phillip Koss pleaded guilty to charges against him in March 2014 but later withdrew his plea and requested for a new attorney.

Koss’ wife, Le’Ann Koss, pleaded guilty and was sentenced last October to serve 70 months in prison, followed by five years of supervised release. She was also ordered to pay a $2000 fine and a special assessment fee of $200. Their son, Connor, also pleaded guilty and was sentenced to 121 months in prison, three years of supervised release and a $1,000 fine. Both pleaded guilty to charges of conspiracy to possess with intent to distribute more than 50 grams of marijuana and aiding and abetting possession with the intent to distribute.

Prosecutors claim Phillip and Le’Ann grew marijuana in California with their sons, Connor and Chad, and another man, Brian Smith, and would sell it near Baylor’s campus.

Chad Koss, who was charged with conspiracy, pleaded guilty and was placed on probation for three years, with six months of which to be served on home confinement. Smith received a two year federal prison sentence.