I don't think she knew him or had any kind of relationship with him. I believe it's possible she was mistaken and went to the wrong floor. That part is not unreasonable. I'll give her that much. But I think once she got to the door everything that followed was due to her gun-slinging, take no prisoners, this is Texas and we shoot em first and let God sort them out attitude. If she was truly in fear when she got to the door she wouldn't have gone in. Point blank! I think she was desperate for Rivera's attention, I think she has no empathy, I think she's a wannabe tough gal, I think she joined LE so she can exert authority over others and have power over others. That's what her behavior demonstrates. Total disregard for human life, total indifference for others' safety, and a high high degree of selfishness. These are the common traits of all the high profile criminal cases that are discussed on this site. She's no different.