- Take out the gardener with a stealth attack
Once you’ve climbed the gate of Tyler’s house, the gardener can be found with his back to you at the back of a van. Just sneak over and execute a stealth attack to knock him out. The van makes a good, hard surface for this.
- Steal the clothes without being detected
There is another way to access the pool area where Tyler and his friend are. After taking out the gardener, go over to the right side of the house and climb both gates (they’re grey-coloured). Move up just enough so you can see what Tyler is doing. Wait for him to start his final lap, then quickly sneak round to the deck-chairs where his clothes are. Take them and sneak off the way you came. There is just enough time to do this before he notices you. Leave the area to complete the mission.