Angela informs Cam and Hodgins that Bones had woken up, which was their first time hearing it. Cam says that Bones had said the area around the wound was cold, however, Angela had not mentioned that.
"Taser confetti" which is used to match the security guard's taser to one of the victims.
Civilian Taser models do in fact discharge little round dots that have the Taser's serial number on them, allowing police to match them to a purchaser, and to avoid abuse.
However, Law Enforcement "Professional" Taser models, like what a police officer or security guard would carry do not have this feature.
Hodgins claims that ice is only one third as dense as lead. Water ice has a density of slightly less than one gram per cubic centimeter, while lead has a density of 11.34 grams per cubic centimeter, making ice actually less than one eleventh as dense as lead. As a scientist, Hodgins would be aware of this.