This Achievement was Updated a while back, so now your required to grind out 36 continental coins.
*** Spoiler - click to reveal ***once you have 36 continental coins spare, go to your safe house and find John Wick in the basement section (FYI This is on the pre-planning kind of screen) upgrade wick to LVL 2 then start the mission. once you have loaded in you will need to find the basement which is located by right of the van room. go down the stairs then once down stairs go to the left hand side and run past the vault until you find the first level shotting range then go down the left hand side doors next to wick and do the time trial(the time trial isn't actually needed its just if you want a bit of fun other than a easy achievement!) once you have started the time trial and look directly right and where you see a cop & a civy take the cop out and go behind where the cop is where the odd looking statue is and on the bowl that should highlight yellow. so just hold F and your done or 
if your using a xbox controller. or if your using a PS4/5 controller L1