On the face value, this appears to be a case of drowning as there is no evidence of injury on the body. To decide whether it is case of accidental or suicidal drowning, circumstancess of case like mental state of person, any depression, marital dispute and circumstance of death have to be taken into consideration. Homicidal drowning is rare but seen mostly in children. Most drownings are accidental or suicidal. Since information provided is quite less, only this can be inferred.