I have a paper of Toronto Star of Oct.7, 2000 handy. On the A30 page there's a Toronto map indicating homicides in the last 10 years.
From this map, we can find these areas with bad criminal situation:
1, South of Bloor, North of Queen E., East of Parliament, West of DVP.
2, Lansdown and King/Queen W.
3, Jane and Finch.
4, Albion/Finch and Martin Grove.
It's important to clarify that even these areas are relatively "bad" area in Toronto, still the situation in these areas are pretty good. For example, I've been living in Albion/Kipling, and I feel Albion/Finch and Martin Grove is really a peace and nice area --every afternoon I went jogging in that area. I even considered buying a house there in the future!