Brian Hallisay

Jennifer Love Hewitt's fiance won't face criminal charges after allegedly attacking a paparazzo in September -- TMZ has learned, the L.A. County City Attorney has declined to prosecute. Sources at the City Attorney's office tell us, battery charges won't be filed against 34-year-old Brian Hallisay…

Jennifer Love Hewitt and fiance Brian Hallisay were involved in a pasta-fueled confrontation with a photog Friday night ... and cops have launched a criminal investigation. JLH and Brian were leaving the always-delicious Toscana restaurant in Brentwood when a pesky paparazzo prepared to snap some…