Buy a 30x magnifier. Look at the trichomes. You CANNOT tell if a plant is done by looking at the "Hairs". Some plants will have white "hairs" even after it is finished. The "hairs" are actually called Pistils and are there to collect pollen and they will stay healthy and white as long as the plant is healthy and properly cared for. Your goal is good ripe trichomes. Since you are working with a strong indica strain I would recommend letting the trichomes mature a little longer than some other strains. I would expect a nice strong indica punch from an LA confidential plant and that is achieved by letting the some of the trichomes become amber before harvesting the plant. When you see the trichomes going from a silver/blue color and starting to turn to amber its a good time to begin harvest. The longer you wait the more "couchlock" your weed will develop. This is only true for a certain period of time. Indica plants have about a 7-10 day period where the flavor and stone will be perfect. Also, your plants will naturally "Fade" at harvest time. If you harvest a plant with super green leaves it probably isnt ready and wont have the best taste. Let it start to naturally yellow. The yellowing is the natural process of the buds sucking the sugars from the leaves and converting it into starches for trichomes and terpenoids. If you think it is done WAIT ANOTHER WEEK. It may turn purple on you during the final days. It would be worht waiting just to see what she does.