I feel like with so many cameras they will still find you and it will be more suspicious, but I guess it depends if they can tie you to the victim in some other way.
That is why you travel by foot/public transit from a good distance away, covered up, and without a cell. Arrive at the back of the lot where the day workers congregate and make the offer for more cash than what the purchase costs to an individual to go inside and purchase some items. Ideally, you'll want to spread these purchases across multiple jurisdictions, days (or more), wearing different coverings, and mixing in nondescript items with the purchases. If the first individual refuses, leave and make an attempt elsewhere, don't make this memorable.
I like and fear your answer, but having recently watched a ridiculous number of police homicide interrogations, it seems to me that if you are smart enough to get away with murder you are probably smart enough to avoid it in the first place. A lot of murders are solved with cameras and phone records. Even many sociopaths who you might expect to do better.