According to your own drawing you did at least three things wrong:

1. You took a left turn right in front of a car that was stopped at a red light (seems like you ran the red light?)

2. You turned right onto oncoming traffic. Obviously, there were traffic there (the car at the red light and the car that hit your wife).

3. You turned left onto oncoming traffic (a one way street even).

The car was on a one way street, about to turn right where there were three lanes in the same direction. The last thing he would expect is someone coming from his right.

Sverre