Remember when the cop show came out on regular TV years ago and they "swore" because "all cops swear"? That was true to some extent, although "swearing" is much like being a "sexist pig with a badge": Just because it was done did NOT make  it right.
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Today with all the dash cams, body cams, and witnesses with cell phones.....law enforcement officers are being much more scrutinized by WHAT they say and HOW they say it......and swearing on tape for a jury to hear is hardly "professional."
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Swearing - and swearing LOUDLY - is quite often the FIRST sign that someone has lost control of his/her emotions in a volatile, heated, and/or tense situation......and that is when mistakes are made.