At Sunday dinner, it is mentioned that Danny never went to college. While it is true that NYPD police officers (and, in particular, detectives) are required to have a minimum of 60 credits of study at the college level, there is a special exemption for candidates who have served at least two years in the military. Danny enlisted in the Marines shortly after graduating high school. Assuming he served at least two years, he would have been exempt from the education requirement of the NYPD. [note: after leaving the Marines and becoming a member of the NYPD, Danny later took a leave of absence from the NYPD to serve two tours in the Iraq war.]
This is the first time that Danny Reagan has let a partner drive.
"You are not obligated to complete the work but neither are you free to abandon it" - Talmud