Una redacción sobre un crimen usando frases para articulos (at frist, lastly, etc) lo necesito para mañana?

An undercover Interpol agent was murdered in a plane, at 6 o'clock.

The body was wrapped in cloth.

At first, it was believed the murder weapon was a heavy object.

Then, the prosecutor in charge of the case proved that the bruise on the victim's back was too large, and the small bear statue that was found as "the murder weapon" couldn't have caused the bruise.

Suddenly, a witness claimed that he had seen the victim enter the elevator at 6 o'clock, but the prosecution found evidence that showed the clock belonging to the witness was three hours behind.

After, the prosecution found an incriminating piece of evidence that pointed to one of the flight attendants.

Finally, he proved her guilt with the fact that the cloth used to wrap the victim came from a box with French instructions, and that flight attendant was the only one who spoke French.

Not only that, but he also found the real cause of death.

The victim had fallen off the railing after being pushed by the flight attendant.