I have created another Riley in my down time today and I hope it is neither too easy, nor hard. As always, good luck to all of you, and have fun!
I see the prefix, a letter you seek; look to the middle, take to I think.
Now for the infix, look to the left; a veil with a crutch, I do attest.
Finding the suffix, isn't really a chore; a noise you will shriek, when your face hits the floor.
Overall in the present, but look to the past; if you want to learn more, simply just ask.