Busted!

I'm watching a movie (Ghost Dog, which I haven't finished yet) when I get a notif on facebook about rolling out to climb a building from a UE friend (Dreads) and his roomie(Jet). I keep watching til around 11, then I head to his place. I trust him although I've never opped with him because he ops on his own through UE both day and night. I get there, eat a bit, sip some water and we head out, I'm riding on the back of Jet's bike. Here's the set up:
Dreads-
Black School T-shirt
Black Shorts
Sneakers
Bike
Jet-
Black T-shirt
Black Jeans
Sneakers
Backpack
Rope
Water Bottle
Analog Camera
Green Towel
Bike (with me riding in the back)
Me-
Brown Shirt
Black Hoodie around my waist
Woodland BDU Pants
Black Water Shoes
Pocket Knife
Flashlight
Camo Bandanna
Wallet <- :-/

We bike there pretty uneventful, I tell them a bit about the fruit dumpster, they tell me a bit about the building the want to roof. We get there, hop off the bikes. and walk towards the building, it's surrounded by barbed wire chain link, except for some railroad tracks that lead right in. We walk along the tracks above some lights that would otherwise silhouette us and follow them until we get into the compound.
First thing we notice is some bright lights that look light head lights, I scout ahead sticking to the walls and discover it's just regular lighting and that the area seems unoccupied (the building is abandoned anyways). I dash to underneath a staircase and look around more, then I run to a wall and stick my back to that. I signal everyone to come to where I am then point out a dome camera. After a bit of talk we decide to walk around regular style to look less suspect. We exit the shadow and walk through another gate, continue along side the building.
We noticed a guy across the water (we're on an island or peninsula thing, the tracks crossed a bridge) in neon orange but he probably doesn't see us. I point out what looks like an elongated water tower with a huge pipe on top maybe 3 or 4 stories up that could be used to roof the building if it wasn't so high, rusty and generally scary. We climb up the lower ladders anyway just for fun and hang out on the lower platform. After a while we notice some real head lights moving around where we came from, but they turn off. Jet starts heading down when another pair of headlights rolls around relatively fast coming our way. I tell everyone to hit the deck and Jet to do the same when he hits the bottom. First security car rolls by no problem. Next vehicle comes through much slower with lights waving around slowly looking out. I'm flat on the metal platform, Dreads is flat against the tower, Jet vanished into the bushed at the foot of the ladder, I thought we were ghosts, turns out not to be the case. Second security car stops in from of the tower and a booming voice shouts for us to come out and get down in French. It's pretty intimidating and seeing how we're cornered up a ladder Me and Dreads comply. A lady cop (turns out she was a security guard, but we found that out later) gets out and starts questioning us blah blah blah.
She radios in her buddy another guard, this one is a guy, he rolls in with a second car, we're covered in lights and Jet has come out to talk also. None of us have ID (I do but I keep that to myself) so we get questioned a bit;
"What are you doing here?"
"Just exploring"
"Didja go inside this building?"
"No"
"How many times have you been here?"
"First time"
Blah blah blah...
Turns out they had a big graffiti issue here so they set up patrols, also it's in a pretty historic neighborhood so the beefed up security makes sense in retrospect. In the end a real cop came checked our names in the computer and left us to the security guards who seemed cool with us (because we're cool). They let us out and gave us a warning for trespassing.
We walked away relieved and happy. After that I took Dreads and Jet to the fruit dumpster and we got a ton of nectarines, some pine apples and some veggies. Tried finding a bakery dumpster but it would've involved climbing a wall into an alley in front of some cops so we checked around elsewhere but came upon nothing and called it a night.
Lessons learned:
Be aware of who you're dealing with (are they a cop, a guard, a person in dark clothes...)
Know you're rights and make sure everyone else does too (know a ton of legal stuff about getting caught in the US, no idea how it works here, need to read up. Any links to Canadian laws or videos would be helpful)
Never relax while hiding even if you feel like a ghost.