When Jill meets Paul Baylor at the Police Department, a suspicious looking fat and bearded man enters the hall behind Jill and goes into an office. When the angle changes, the man is back in the hall again, visible over Jill's shoulder.
When Jill is investigating at Manescu's apartment, she's clearly wearing high heeled wedge shoes. When confronted by Danner and Lembeck, she uses the high heel to kick Danner away. In the follow up, the stunt double is clearly wearing athletic shoes when she jumps over the rail and sprints across the driveway.
At the golf course the man hits no ball at all.
Jill reads a last name on a door and says "Manescu, that's an English name". The name---like most names that end in "u" very much betray---is actually Romanian.
Furthermore, Jill pronounces the name as "Mah-NES-Q", but the name is actually pronounced "Mah-nes-KOO".