Ace

Sean Cullen has played three different characters over the course of the series:

• Episode 11.22 Ace (2010) - Brett Trask
• Episode 11.16 Witness (2010) - Brett Trask
• Episode 10.17 Hell (2009) - Brett Trask
• Episode 5.24 Poison (2004) - Pete Campbell
• Episode 1.15 Entitled (2000) - Arthur Pruitt

Benson and Stabler have to convince ADA Marlowe to arrest the suspect for raping Sophia so that he doesn't get released and flee the jurisdiction and/or rape another woman but she is hesitant to do so because they don't have Sophia to make a complaint against him. Yet Munch and Fin caught the suspect forcing another pregnant woman to walk with him at knife-point, he threatened her with harm to her unborn baby if she didn't go with him. That means they can arrest him and charge him with: kidnapping in the second degree, a class B felony with a minimum sentence of five years in prison and a maximum of 25 years; criminal possession of a weapon in the third degree, a class D felony with a minimum sentence of two years in prison and a maximum of seven years; and menacing in the second degree, a class A misdemeanor with a maximum sentence of one year in jail. With the suspect's prior criminal record of sexual assault he would either be remanded or be given a high bail amount, and upon conviction he would get the maximum sentence giving them more than enough time to build a case against him for Sophia's rape. So the debate about not having cause to arrest him so he can't get away or harm another woman was redundant.