Pittsburgh area was bitterly cold.
Did the sisters need furnace help?
>>Why were they executed in the basement?<< Good question
Undressing before or after murder with no sexual assault
(that we know of) is so 'personal'.
>>Why kill BOTH sisters?<< Susan was the victim of horrific attack. She was the object of the crime. Sarah came home during/after the attack, and was killed because she was a witness.
>>Why stay in the house all lit up for hours?<< Nice, warm place. Looked for valuables. Maybe did laundry, and showered. Didn't care about the electric bill. May have know Sarah was coming home, with a car to steal. May have known sisters lived alone, that he would be undisturbed.
>>How did perp know which car to steal?<< The warm one parked outside the house, the make of which was on the key Sarah brought into the house.
>>As close as the houses are parking is a premium to find in front
of the houses.........unless there is a garage.<< No garage. On street parking. Housing not dense; there is plenty of room to park.
>>Did he wear gloves?<< Winter gloves, for sure. We don't know if he brought other gloves.
>>Did LE find the keys?<< Unknown.
>>No finger prints on car? house?<< Unknown.
So many questions.
>>The perp may not be homeless.........<< If the grey sweat pants with the business card inside found by police are his, we can rule out he is fully employed. He can afford to pay bus fare. He may live somewhere on the 71A bus line.
he could be a druggie.
>>Is there a meth clinic near where the sisters work? live?<<Yes. Sustance abuse, in any case. One at the notorious corner of Stanton and Negley.
LINK Other places in East Liberty as well, including social services offices.