Assassin bug nymph

6156  Hello I just killed this bug in our child’s room in Toronto, Please note the little spots on the back. Please help! Richard 

This is a nymph of Reduvius personatus, an assassin bug (Hemiptera/Heteroptera: Reduviidae) known as a masked hunter. This is an introduced species likely of European origin that is frequently found indoors where it feeds on the insects and other arthropods it finds there. It is reported to have a very painful (but not dangerous) bite; see https://tinyurl.com/23g4bdy for more detailed information.  Ed Saugstad, retired entomologist; Sinks Grove, WV.