Simplify the following text for a Grade 16 native English-speaking person.
Original: Skilling was ultimatly convicted of multiple federal felony charges that related to Enron 's financial collapse , and he is currently serving a 24-year , four-month prison sentence at the Federal Correctional Institution in Englewood , Colorado .
Simplified: In 2006 he was convicted of multiple federal felony charges relating to Enron 's financial collapse , and is currently serving a 24-year , four-month prison sentence at the Federal Correctional Institution in Englewood , Colorado .