Because I was trying to be prudent and bold the minimum I could to get the point across. I could have bolded the entire thing but that runs counter to the purpose of bolding. I linked it all because it should be read, that sentence included. Read the whole thing. It explains why they didn't make that determination. I'll remove all the bolding so you don't get confused.
"We did not, however, make a determination as to whether the president did commit a crime. The introduction to the volume two of our report explains that decision. It explains that under long-standing department policy, a president cannot be charged with a federal crime while he is in office. That is unconstitutional. Even if the charge is kept under seal and hidden from public view, that too is prohibited. The special counsel's office is part of the Department of Justice and by regulation it was bound by that department policy. Charging the president with a crime was, therefore, not an option we could consider."
They didn't make a determination on obstruction because they legally were not allowed to, not because they didn't find evidence of a crime. They did.
