Ghost in the Shell 1.5: Human Error Processor #5: Mines of Mind Part 1

Section 9 special agents Batou and Togusa are investigating a series of brutal murders that appear to be linked by the victims' common tattoo, a military design. A found yacht key could help unlock the mystery behind the murders, but if the Section 9 agents want to toss the boat, they'll have to get in line-behind two killer cyborgs with a distinct antipathy for cops!