Drub McKumb, a Human male with blue eyes and a portly build, plied his trade as both a smuggler and spacer. Both Han Solo and Mara Jade had crossed paths with him during their own times operating as smugglers.
The last time McKumb encountered Han was before the Battle of Hoth; during that encounter, he gave Han a warning on Ord Mantell concerning the bounty placed on Han's head by Jabba Desilijic Tiure.
Some years afterward, specifically in 12 ABY, Han traveled to Ithor to witness the Time of Meeting alongside Leia Organa Solo. It was then that a deranged Drub tried to alert Han to the imminent danger presented by the Eye of Palpatine. He had acquired yarrock from Fargednim P'taan and used it to keep his insanity at bay for a short time.