So, Matsuda was key - but what the intrepid heroes did not realize is that time stands still for no one. Still fuming over the loss of his partner - TheRatPack was still professional enough to put the needs of his mission over the personal needs of revenge. His spider web spun with the invasion of the Cell phone service providers via hacking, was paying off handsome dividends, as always. By force of habit, using his ability to enter the net via a mobile cyberdeck, he had entered into the Cell phone servers to find out what cell phones were within 50 feet of him at Joe's Diner in Night City. Normal battlefield preparation as it were. By rendering all cell phones inoperable for the expected time he and Billy Jack (the guy the players describe as "Crew cut guy" of the Odd Couple comprised of Billy "Jack" Jackson and TheRatPack) were expected to have a "Discussion" with the player characters - he'd make it such that frantic calls to the police would not be answered.
So, cross referencing the cell phone data with who owned the phones, TheRatPack was able to discern that one set of phone numbers matched an employee of Continental Investigations Agency (a prior hack performed upon the death of Felix to see what incriminating information Felix had dug up). one plus one equals two - and now TheRatPack knew who to target. He penetrated the text messages being sent, developed a web of contacts between the key individuals, and discovered that two of the three investigators on his tail were involved with girlfriends. So - a simple plan was hatched. Send text messages to the two women from the boyfriends - have them meet where they could be abducted easily, and then send a message to his pursuers from their phone accounts "We have your woman, meet us under the Gibson Memorial Bridge in Night City.