That was really fun to play. here is my feedback:
1) as a person with slight reading comprehension deficit, a text based game is not usually something I'm interested in. this kept my attention even though i couldn't read everything before several of the messages went away. i think there were 3 or 4 long ones that i didn't make it through. not much for you to change here because its a time based game. only way i can see around this is to have the person read something in the beginning and calculate the time it takes them to read it so you know what their reading speed is then adjust the lawyer timer based on that. somewhere from 10 minutes for fast readers to 15 minutes for slower readers.
2) a single case to solve is ok and it did change when i played it the next times around based on who was talking more or at what times but I would love to see multiple cases in the future. maybe start the game outside of the interrogation room with a selection of different cases and your goal is to solve them all or as many as you can by the end of the day.
3) consider throwing in something that breaks the gameplay like another person entering the room that pulls one of the cops away for a moment so you are forced to be the opposite one for 10-20 seconds.
4) i didn't know who was talking at first. it took me a little bit to realize that the two cops were at the bottom and the person being interrogated was at the top. would suggest to add some static images that show the person being interrogated during the whole thing and the good cop/bad cop slide in and out of the screen as you change who is talking. hope that game mechanic makes sense.
overall a very well done game. the concept here of switching during an interrogation is phenomenal to me. the change in color and speed of speech when switching is fantastic. these aspects kept my interest for a while but the replay ability is not that high with a single case. please take my feedback into consideration. if you do make an update to it, let me know so i can play it again. hope to see more from you in the future!