Complex sentence: One of Bourque's friends described an incident where Bourque had gone camping with several colleagues and brought his rifle with him, which he held onto the whole night while drinking.
Split into simpler sentences: One of Bourque's friends described an incident where he was irresponsible with his firearms in the past. In one encounter, she recalled that Bourque had gone camping and brought his rifle with him, which he held onto the whole night while drinking.