Elliot and Fin were investigating a rapist murderer. The victim had scalding hot water burns that Elliot easily identified to Fin's puzzlement.
Elliot: What can I tell you? I got 5 kids, sometimes they grab a pot from a hot stove. Bandaged my fair share of wounds.
Note: Normally I would have put this in the "Shorts" entry, but this is the first episode that Elliot started to say "I got/have 5 kids/children" since the birth of Eli in the previous season after 8 seasons of "I got/have 4 kids/children"