valentina alvero, 68, a devout catholic who was the life of any party.ei nan, a stylish 62-year-old who reserved her weekends for waltzes. her niece remembering her aunt as joyful. >> very charming and sassy at times. >> what kind of dances did she like to do? >> overall, she really likes ballroom dancing. so it's like, any dances that's with one partner. >> reporter: mei-mei and other monterey park residents were doing what they love, dancing, when shots rang out in the star ballroom. challis was inside with her dance partner of 15 years, yu kao, who she called andy, when she heard gunshots. >> i thought -- when i hear the boom, boom -- >> reporter: the 57-year-old says in the midst of the chaos, andy was shot in the back and eventually died. >> that time i wake up a little bit, i wake up my partner. "wake up, wake up." he don't respond at all. and after, he don't respond at all. and after that, i'm -- on my hands is blood. i was like, am i got shot? >> was i shot? your hands had blood? >> i think the blood is from him. >> reporter: tonight, challis hon