Bensalem police received the messages Saturday morning.
A woman told police she had been sexually assaulted.
She texted she was still in the bedroom with the suspect and was unable to leave.
Officers immediately located her using the GPS on her phone.
Police arrived at the home on Neshaminy Valley Drive and arrested Christopher Henneghan.
Investigators say he punched the victim in the head and forced her to perform sex acts at knife-point.
The 23-year-old is being held on charges of rape and false imprisonment.
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