Law enforcement sources told gossip website TMZ.com that they found the evidence of pornographic imagery on Chelsea's phone, but it is currently unclear when she received it.
Sheerer, 25, faces charges of child endangerment and distribution of obscenity to a minor, and if convicted he could serve up to 10 years in prison.
He is currently being held on $40,000 bail.
A source close to former 'The View' co-host Rosie, 53, previously admitted she was "extremely concerned" about Chelsea, who is battling mental illness and stopped taking her medication before she went missing, after she was found in the company of the alleged heroin addict, who initially denied she was with him.
The mother and daughter enjoyed a peaceful reunion last Wednesday (19.08.15) after police located Chelsea approximately 130 miles from their home in New York by tracking a signal from her mobile phone just hours after Rosie issued a public appeal for any information on her whereabouts.