ADA Stone offers Gary Dolan a plea deal; if he pleads guilty to sexual abuse in the first degree, Stone will recommend a sentence of 3-9 years. However Sexual Abuse in the First Degree is a class D felony, meaning it carries a maximum sentence of seven years in prison. If the only charge Dolan is pleading to is SA-1, then by law he cannot spend more than seven years in prison, certainly not the maximum of nine years Stone offers.
The sergeant talking to Benson and Carisi at the suicide scene is wearing a cap with a patrolman's black hat band, instead of the gold one appropriate for a sergeant. He is wearing the correct gold hat badge, however.