My question involves bankruptcy in the state of: california

i have heard that the NORMAL time that a trustee will look back for asset sales or transfers is one year. has anyone that has filed bk, had the trustee look back farther? my roomate is considering filing bk, and we sold a house a little over a year ago, and another house sold 4 years ago.
if she spent any profits over a year ago, and is just now thinking of filing bk, she has tax exempt income and is under the median so no tax returns to look at. has anyone had trustee look back farther than one year? i know, i know some will say if fraud is suspected they can look back farther, but spending any profits over a year before thinking of filing bk, surely cant be considered suspicious. a lot of things can change in the course of a year or more.