Story highlights Temperatures dipped into the mid-30s during 4 days man lay in woods of Philadelphia park

Mom told police son was with her in Maryland, but he was found Friday with blanket, Bible

Victim being treated for malnutrition, dehydration; mother faces host of charges after extradition

(CNN) For more than four days, police say, a 21-year-old quadriplegic with cerebral palsy was left lying in the woods of Philadelphia's Cobbs Creek Park with only a blanket and a Bible.

The person responsible is the man's mother, who on Sunday faced a host of charges after allegedly abandoning her son and catching a bus to Maryland to see her boyfriend, said Philadelphia police Lt. John Walker.

Low temperatures reached the mid-30s during the week , and rain was reported in the area Wednesday and Thursday.

The man is unable to communicate how he came to be in the park, but Walker told reporters that the man's mother, whom he did not identify for CNN, left him there Monday morning.

"Sometime at 11 a.m., the mother went to visit her boyfriend down in Maryland, over in Montgomery County, and we believe she placed the child into Cobbs Creeks Park," Walker said at a news conference.

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