Complex sentence: In cross-examination, Chutney claims to have been taking a shower and washing her hair at the time of the murder, with the noise drowning out the gunshot--however, she had also admitted she had her hair permed earlier that day.
Split into simpler sentences: In cross-examination, Chutney claims to have been taking a shower and washing her hair at the time of the murder, and that the noise drowning out the gunshot. However, she had also admitted she had her hair permed earlier that day.