It is the day after your coffee date and you are typing some stuff on your computer 

"excuse me are you detective (Y/L/N)" the boy's nanny asks

"oh yes I am" you say poking your head up from your computer 

"follow me" you get up and lead the nanny to the integration room 

"am I being charged" the nanny asks 

"it depends on what the rape kit determines" You say 

"but what I want to know is where were you yesterday" 

"I was looking after Calum but I got a phone call to say my sister is in hospital and being my sister I had to go" she says realising what her actions have caused 

"can your sister confirm that you where at the hospital" you ask nicely because you can see her in distress and you don't want to upset her further 

"yes she can here is her number" she replies 

"one last question do you know who would want to kill Calum?" You ask 

"he was such a nice boy I don't think anyone would kill him" she replies and then starts crying 

"it's all right because we will catch the killer" you say trying to clam her down

"I am so sorry that I let this happen" she sobs again 

"it's alright you had to make sure your sister was alright" you say 

"I think I know who might of done it" the nanny says 

"who?" You ask 

"the boy's estranged father" she replies

Ten minutes later you have concluded your interview with the nanny and talked to the sister. You sigh 

"what's wrong" Olivia asks 

"it's the way this case is going" you reply 

"the nanny checks out and the only lead we have is the boy's father" 

"we've got the rape kit back" Sonny says as he enters and sits at his desk 

"so what's the results you ask "the result belongs to the father" he replies "of all people"

Flashback: your brother is in your room talking to you 

"sis should we run away" he asks really scared that the hag of a foster mother will beat him up again 

"I think we should but not yet" you reply 

"because I have a plan" 

"what is the plan" he asks 

"the next time Hag does anything to you or me will record it my phone and go to the police" you say cheering your brother up

"(Y/N) are you ok" Carisi asks because you zoned out 

"oh sorry I was just thinking about the father" you reply