A Richland couple were arrested on drug charges after police responded to call a about the smell of marijuana coming from their home, authorities said.

Officers contacted Jerry D. Richwine, 28, and his wife, Sandra Knight, 43, at their home in the 900 block of Davenport Street on Saturday, said Richland police Sgt. Mike Harrison.

Richwine told officers he had a valid medical marijuana card and was legally in possession of the marijuana, Harrison said.

State law says a person with a valid recommendation for medical marijuana can grow up to 15 plants and have a 60-day supply of processed marijuana, which is set at 24 ounces.

Officers, however, determined Richwine had about 9 1/2 pounds of pot in the home, police said.

Richwine also reportedly had hydrocodone pills but not a prescription.

Knight, who had an outstanding warrant for her arrest, also was found with marijuana and drug paraphernalia, which was given to her by Richwine, police said.

Richwine was booked into the Benton County jail on suspicion of possessing a controlled substance, delivering marijuana and possessing more than 40 grams of marijuana.

Knight was jailed for possessing marijuana and drug paraphernalia.