(CNN) A Baltimore postman pleaded guilty on Monday to conspiracy to distribute marijuana on his mail route, court documents say.

According to his plea agreement, postal worker, William McRae, was paid in cash and marijuana to distribute over 100-kilograms of drugs along his mail route over the course of a year.

Court documents lay out how the scheme unfolded: Co-defendant Michael Gray would contact McRae several times a month, telling him he planned to mail marijuana into Maryland from California. McRae told Gray where to deliver the packages at different Baltimore addresses on his route, the plea agreement says.

CNN reached out to attorney's for McRae and Gray, but has not received responses at time of publication.

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