Especially if you are guilty, you should ask if you are free to go, and if you are not, ask for an attorney. This is advisable even if you are innocent if the crime is significant.
I want to emphasise this. The prisons in the U.S. (and probably most countries) are full of people who believed that they were safe, despite being suspected, due to their innocence. Remember, innocence is no excuse if they find you guilty anyway. (This is even true after the fact; new evidence of innocence is not enough to get a new trial, as long as your rights were not violated in the old one, according to the Supreme Court.)
Four months later, a person who was legally guilty (so found by a jury in a valid trial) but actually innocent (probably) was killed by the State of Texas.
ETA: As the court’s opinion points out, there is a procedure for relief when one finds new evidence of innocence: clemency. Good luck getting that in Texas!
I want to emphasise this. The prisons in the U.S. (and probably most countries) are full of people who believed that they were safe, despite being suspected, due to their innocence. Remember, innocence is no excuse if they find you guilty anyway. (This is even true after the fact; new evidence of innocence is not enough to get a new trial, as long as your rights were not violated in the old one, according to the Supreme Court.)
Wait, what? [citation needed]
Herrera v. Collins, 506 U.S. 390 (1993)
Four months later, a person who was legally guilty (so found by a jury in a valid trial) but actually innocent (probably) was killed by the State of Texas.
This is the best short coverage that I found in a few minutes’ Googling (using the defendant’s full name): http://www.executedtoday.com/2009/05/12/1993-leonel-herrera-v-collins/
ETA: As the court’s opinion points out, there is a procedure for relief when one finds new evidence of innocence: clemency. Good luck getting that in Texas!