It is reported from Sayyiduna Ali (may Allah be pleased with him) concerning a man who finds a runaway slave, and then the slave runs away from him as well, that Sayyiduna Ali (may Allah be pleased with him) did not hold him liable, whereas Shurayh (may Allah have mercy on him) held him liable.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب اللقطة / 12127