Complex sentence: The owl theory was raised after Durham attorney T. Lawrence Pollard, who was not involved in the case at the time, approached the police suggesting the possibility that an owl was responsible after reading the SBI evidence list and finding a "feather" listed.
Split into simpler sentences: The owl theory was raised by Durham attorney T. Lawrence Pollard, who was not involved in the case at the time, but approached the police suggesting that an owl might have been responsible. He raised this possibility after reading the SBI evidence list and finding a "feather" listed.