Context: Kitahara Iori 北原伊織 is talking with someone that says something that could be misinterpreted badly.
choi matta ちょい待った Wait a bit.
sono serifu tte {hata kara miru} to suggee hanzai-shuu ga... そのセリフって傍から見るとすっげぇ犯罪臭が･･･ That line, if {seen by a third-person}, [it] [has] an incredibly criminal smell. (literally.) If someone hears that without context, they'll think it's a crime. (incomplete sentence, double subject construction with tte って topic marker.)
serifu 台詞 - a line, in the sense of dialogue, something that someone says, or said.
hata kara miru 傍から見る To see from the sidelines, in the sense of how an onlooker interprets a situation they aren't involved in, without full context.
