bethesda. police say the man tied up a mother and her son then sexually assaulted the housekeeper. it happened this morning on barden road. tonight, we have learned the crime might be linked to another attack. pat come.sin bethesda with the latest. pat? reporter: jim, one suspect, two home invasions. police say he is armed. he s dangerous. and he is still at large. in is a picture of a man wanted in not one, but two home invasions, one yesterday in wasn t, another in bethesda a woman taken to the hospital after a sexual assault and armed robbery in this neighborhood near nih. police on roof tops searching high and low for a cell phone linked to this disturbing home invasion. this is how police say it happened here in beth these d.a. this morning on barden road in bethesda. a short time after that, she hears a knock on the door. at the door, she is confronted by a gunman wearing a mask. and a robber goes inside and ties up the housekeeper and two residents of that house, a w