I don't have screen caps for this, but....
Apparently my Cop Sims house is a robber magnet. I swear the same robber struck about 12 times. I moved them out into a bigger place [because their little starter home wasn't going to accommodate the incoming baby], and the robber still tracked them down and attempted to rob the place!
He only succeeded once, but the strange thing is since my cop sim beat him up outside the house, the item he stole turned up in the Family Inventory.
Edit: My cop sim always succeeds in beating him up [and gets the I WON moodlet], but that might be because the robber has the unlucky trait.