Parq, a Imperial officer with the rank of Colonel, took part in the search operation on Tatooine's Mos Eisley for R2-D2 and C-3PO. This occurred shortly before the Battle of Yavin.
The Colonel, covered in sand and perspiring, guided his Stormtroopers into Chalmun's Cantina. He was pleased to identify the Tonnika sisters at the bar and immediately placed them under arrest, acting on the authority of Grand Moff Argon. Unknown to him, he had actually apprehended the Mistryl Shadow Guard fighters Shada D'ukal and Karoly D'ulin, who were masquerading as the Tonnikas.